With a security detail to rival that of a president, Roger Federer strode along St Mary's Walk and into Court 14, crowds on the concourses urged to clear a path for a man rarely seen in such parts of the All England Club.

This was the king among his people, out in the boondocks by his standards. With a mighty swish of his racket, he might just be able to launch a tennis ball onto Centre Court's roof from down here.

It was day two of the 2015 Wimbledon championships, a warm Tuesday morning, and Federer needed a warm-up before his opening match against Bosnian Damir Dzumhur, a player that later in the day he would trounce for the loss of just seven games. That would of course be a Centre Court assignment. Invariably all of Federer's matches get centre stage.

The tiny Court 14 seats a couple of hundred spectators, maybe a handful more at a push, and whispers had spread to mean many were occupied for what was an unadvertised practice session, a Federer guerrilla gig. The media had been given a little advance notice, and a glimpse of Federer at close quarters is hard to turn down.

There was a hefty hint Federer would be arriving when Stefan Edberg - his coach and childhood idol - showed up several minutes ahead of his charge and began to limber up, while Rob Walker of Wimbledon TV stood patiently with a camera crew and a stack of notes, ready to tell the story of the day Federer played where only mere mortals usually tread.

Suddenly more news crews appeared, a stream of day-trippers strolling past the inconspicuous court became more like a scrum, and out came the camera phones, ball boys and ball girls craning for a view, making sure of a close-up shot. A woman working for IBM grinned ear to ear. And in walked Federer, dressed head to toe in white Nike gear, carrying a couple of Wilson tennis rackets and a cap bearing his RF insignia.

A G4S security man practically bit off his bottom lip while attempting to keep a straight face and simultaneously enforce crowd control as Federer passed by him. Thou shalt not smile.

Applause rang out, fans with cheap-rate ground passes cooed at the sight of the then seven-time champion. Federer acknowledged the swelling crowd.

And for the next half-hour or so he and Edberg gently put in a light session, rallying from the baseline, these great champions going through the motions that on another day might have taken place out of public sight. It amounted to little more than a balm to the ego before lunch.

And this was just another day in the life of Roger Federer, who has now announced his retirement. He has probably forgotten all about it. Some will remember it for the rest of their lives.

Edberg takes on a real relevance in the story of Federer's retirement because they spoke together about how to go through the process.

Swedish great Edberg announced his own decision to quit in December 1995, a month before his 30th birthday, and the 1996 season became his farewell tour, feted everywhere he went.

But Edberg struggled with his form in that year of goodbyes and glad-handing, reaching only one final, losing to Boris Becker in the Queen's Club title match, and he ultimately regretted the hoopla that followed him around.

Speaking to The Tennis Podcast in 2020, Edberg explained how he warded Federer off following his example.

"We actually talked a little bit about it and I would not recommend it to anybody actually, even if it's a nice thing to do, because it does put too much pressure on yourself and there would be too many things going on in your mind," Edberg said.

"So if you're going to announce it, I would do it just before my last tournament or have it in my mind, but not for anybody else to know. It's very tough to handle, but at the same time it was a very memorable year, but I would not recommend it."

Federer only worked in tight tandem with Edberg for two years, but he has so much respect and admiration for the man that such advice was sure to have registered.

And now the 20-time grand slam winner is retiring. Let that sink in.

It will take some getting used to, tennis without Federer. Without his ritual beastings of young upstarts on tour, without his perfect manners, quasi-aristocratic foibles, and those multilingual, exquisitely delivered, post-match news conferences. Without Anna Wintour gazing down adoringly from the Royal Box. Without Mirka.

"I wanted to be a tennis player or a soccer player from a very young age," Federer said at Wimbledon some years ago.

Was there a Wimbledon final that tilted him the way of tennis?

"I think the Becker-Edberg final. I don't remember which year because they played a few times. I was sitting at home in the living room, watching them play, thinking hopefully one day I can be like them, you know," Federer said.

Edberg and Becker met in consecutive Wimbledon finals from 1988 to 1990, the Swede winning the first and last of those matches. Theirs was a great rivalry.

"That's I guess where idols and inspirations are good. They push you forward," Federer said. "Then along the way you joke around and say it's coming closer. When you win a practice match, you just fake like you've just won Wimbledon. All of a sudden it's really happening."

It was "really happening" for Federer by the late 1990s, as he won the boys' singles at Wimbledon in 1998, beating Georgia's Irakli Labadze, and barely 12 months later he was a top 100 player on the men's tour.

But he was a firebrand too as a teenager, something he was compelled to explain at Wimbledon in 2001, when the 19-year-old Federer became the centre of attention for the first time after defeating Pete Sampras, champion for the previous four years, in the fourth round.

Federer had been a picture of composure in that match and was asked whether he modelled his approach on ice-cool Pistol Pete.

"Not at all actually. I was throwing around my racket like you probably don't imagine," Federer said. "I was getting kicked out of practice sessions non-stop when I was 16. Now since maybe I think this year, I started just to relax a little bit more on court.

"I'm not smashing as many rackets as before. I realised that the racket throwing didn't help my game because I was always getting very negative."

When Federer got his hands on a grand slam trophy for the first time, it was Wimbledon in 2003 and he was lobbed a prescient question by a reporter who asked whether he might one day emulate seven-time champion Sampras at Wimbledon.

"This is one of his seven, you know. I'm so far away," he said. "I'm just happy to be on the board. If I look at all the players who have won here, a lot have been idols to me. Just to be on the board with (Bjorn) Borg and these people, it's just nice to be a part of history at Wimbledon."

Nevertheless, that was the first of five consecutive Wimbledon triumphs for Federer, matching a Borg record. Around such feats are legends created; because of the vicarious pleasure he provided to so many, crowds will forever flock around Federer, whether on Centre Court, Court 14 or his local food court.

As Federer's slam stack grew, and he nudged nearer Sampras' hauls of seven Wimbledon titles and 14 majors, the American great made his Swiss successor a promise: he would be there when those records began to fall.

When Federer fended off Andy Roddick 16-14 in the fifth set of the 2009 Wimbledon final to go to 15 slams, Sampras indeed was there, albeit he arrived late.

"It was a bit special," Federer said. "When he walked in and I saw him for the first time, I did get more nervous actually. I said hello to him, too, which is unusual. But I thought, I don't want to be rude."

And in 2017, nudging 36, Federer triumphed at Wimbledon for an eighth and final time, beating an injury hampered Marin Cilic.

"Winning eight is not something you can ever aim for, in my opinion," he said afterwards. "If you do, you must have so much talent and parents and the coaches that push you from the age of three on, who think you're like a project," he said. "I was not that kid. I was just really a normal guy growing up in Basel, hoping to make a career on the tennis tour."

At the beginning of 2018, he added a sixth Australian Open title to reach 20 slam crowns, a figure beyond the wildest dream of anyone in men's tennis before the Big Three showed up.

The argument rages on about who has been the greatest men's tennis star of all-time, and whether it should be Federer, Novak Djokovic or Rafael Nadal from this era who is the prime contender for such a nebulous crown.

Federer has a losing head-to-head against both his younger rivals, there is no escaping that fact. He trails Nadal 24-16 and Djokovic 27-23. Both have been whittling away at his records, taking their fair share. Yet Federer still has the most Open Era match wins among men at Wimbledon (105) and the Australian Open (102), the most wins in slams overall by a man (369), and the most grass-court singles titles in ATP tour history (19).

He won 103 tournaments, second only to Jimmy Connors (109). He underwent knee surgery twice in 2020 and returned to seek more silverware, because he believed he could still win, even as his 40th birthday approached.

Federer is the man who recalibrated the levels that players can reach in men's tennis, the game-changing figurehead that Nadal and Djokovic have been chasing from the outset of their own magnificent careers.

Without Federer to aim for, perhaps Nadal and Djokovic would not have scaled such great heights.

Perhaps, perhaps, perhaps...

What is certain is that the Federer era is ending. And that's the thing about eras, they always end. Sometimes, you've just got to be grateful to have lived through them. Roger that?

Roger Federer has announced his retirement from tennis, declaring next week's Laver Cup in London will be his farewell tournament.

The Swiss great, who has won 20 grand slams, becomes the first of the 'Big Three' on the men's tour to call it a day, with Rafael Nadal and Novak Djokovic still active.

Federer said he was making a "bittersweet decision", having battled knee injuries in the hope of returning to the tour.

Now 41 years old, Federer wrote in a statement on social media on Thursday: "As many of you know, the past three years have presented me with challenges in the form of injuries and surgeries.

"I've worked hard to return to full competitive form. But I also know my body's capacities and limits, and its message to me lately has been clear.

"I have played more than 1,500 matches over 24 years. Tennis has treated me more generously than I ever would have dreamt, and now I must recognise when it is time to end my competitive career.

"The Laver Cup next week in London will be my final ATP event. I will play more tennis in the future, of course, but just not in grand slams or on the tour."

Frances Tiafoe has replaced John Isner in the Team World line-up for next week's Laver Cup in London.

Isner has failed to recover from the wrist injury that forced him to withdraw from the US Open ahead of his second-round match against Holger Rune.

Fellow American Tiafoe knocked out Rafael Nadal en route to reaching the semi-finals at Flushing Meadows, where he was beaten by tournament winner Carlos Alcaraz.

The 24-year-old, now at a career high of 19th in the ATP rankings, will take Isner's place at the O2 Arena as Team World aim to end Team Europe's run of four triumphs in a row.

Tiafoe previously took part in the tournament in 2017 and 2018, but has missed the past two editions.

Team World captain John McEnroe said: "I am thrilled to have Frances on the team. 

"He's raised his game to a whole new level and has shown he can compete and win against the best players on Tour. He brings a positive energy that should help the entire team."

Tiafoe joins Felix Auger-Aliassime, Taylor Fritz, Diego Schwartzman, Alex de Minaur and Jack Sock on McEnroe's six-man team.

Team Europe, led by Bjorn Borg, is made up of Nadal, Novak Djokovic, Stefanos Tsitsipas, Casper Ruud, Roger Federer and Andy Murray.

The tournament is contested on an indoor hard court and runs for three days from September 23.

Victory at Flushing Meadows on Sunday night saw Carlos Alcaraz anointed both the US Open champion and the new world number one.

The victor of the New York final between Alcaraz and Casper Ruud would climb to the top of the ATP rankings, and a four-set success for the 19-year-old made him the youngest ever men's number one.

That record had previously belonged to a 20-year-old Lleyton Hewitt in November 2000.

Although Alcaraz's huge potential has long been public knowledge, the chances of him beating Hewitt's mark still seemed remote when he started 2022 ranked 32nd.

Even Juan Carlos Ferrero, the Spaniard's coach, did not anticipate a major breakthrough this soon, telling reporters after Sunday's win: "Of course, it comes very fast.

"It's a surprise for everybody except maybe to me, because I trained with him every day and I know [how] he's able to play on the court, [but] I was pretty sure that maybe it wasn't this year; it could be the next one."

By the time he took to Arthur Ashe Stadium against Ruud, however, Alcaraz's ascent to the top of the sport was a surprise to nobody.

Moving from number four to first place might have tied the biggest leap to number one in rankings history, but Alcaraz leads the ATP Tour in both match wins (51) and titles (five) in 2022.

There is little prospect of him slowing now, having become the first man in the Open Era to win the US Open title as early as in his second entry; the last to do so in any era was Pancho Gonzales back in 1948.

"Of course, I'm hungry for more," Alcaraz said afterwards. "I want to be in the top for many, many weeks. Hopefully many years.

"I'm going to work hard again after this week, this amazing two weeks. I'm going to fight to have more of this."

And Alcaraz will have to fight – Ferrero knows as much as that.

"The players now are going to play very motivated against him," the teenager's coach added. "Now he's number one. Before he was two or three.

"Even like this, it's like Real Madrid-Barcelona, there's a rivalry that gets you [to] increase your level. It's what is going to happen to him against his opponents. He has to be ready."

Since Roger Federer became the 23rd different men's number one in February 2004, the rankings have been dominated by the 'Big Three', with only Andy Murray and then, this year, Daniil Medvedev also leading the Tour in that time.

Now, as the 28th number one, Alcaraz – compared by Ruud to each of Federer, Rafael Nadal and Novak Djokovic – can set about securing his own long stay at the summit.

Carlos Alcaraz has a mixture of the qualities Rafael Nadal and Novak Djokovic possess, according to the man he defeated in the men's US Open final Casper Ruud.

Prodigious Spanish talent Alcaraz became a grand slam champion for the first time at the age of just 19 thanks to a 6-4 2-6 7-6 (7-1) 6-3 triumph at Arthur Ashe Stadium on Sunday.

It was a win that propelled him to the top of the world rankings for the first time, while Ruud has now lost two slam finals this year having been defeated by Nadal at the French Open.

Ruud was philosophical about losing to a player many believe will be the dominant force in the men's game, likening his movement on the court to legends Nadal and Djokovic.

"When someone asks about a player's biggest weapon you tend to think forehand, backhand, serve, whatever it is," Ruud said.

"But sort of his movement is one of his many weapons. It makes us other players feel like you need to paint the lines sort of to be able to hit a winner. Sometimes even that's not enough.

"He's very fast. He's very quick. He's a great mover. He can get to balls that we've probably never seen before.

"But you have other great movers, as well. I mean, this game has become so physically demanding, and all the players in the top of the world, they do the right things to improve always.

"Speed, agility of the players I think are just improving, improving. The physical aspect has been not changed but it has improved by everyone.

"I think Novak and Rafa and also [Roger] Federer, I think they kind of set the bar on how well you can move out there. 

"Rafa, when he was Carlos' age, he was also similar. He tracked down everything. Almost no one could hit a winner on him. Novak the same with his flexibility. He gets to certain shots that you think, 'how is that even possible?'

"Carlos has sort of a mixture of both. He's fast, flexible. He can slide around. It's impressive. He's a hard nut to crack."

Ruud can take consolation from the fact his second appearance at a slam final was a marked improvement on Roland Garros where Nadal breezed to a 6-3 6-3 6-0 triumph.

The Norwegian conceded he had more belief going up against Alcaraz in New York, though he – somewhat tongue-in-cheek – added he hopes not to play a Spaniard in any future slam finals.

"I think obviously if you reach a grand slam final, whoever you play will be a great player on the opposite side of the net," he added.

"At Roland Garros, it was hard for me to believe that I could beat Rafa. Today was not easier, but I believed it more. I think these two tournaments have sort of made my self-belief to win a grand slam grow.

"Hopefully these two experiences can help me. I guess I hope I don't play a Spanish player if I ever reach another slam final! They know what they're doing in the slam finals. Let's hope for another than a Spanish [player]."

Ruud added: "I still thought I was the underdog in a way because of Carlos, he's on paper higher ranking and all these things. 

"But it was more fun for me today. I didn't need to play the biggest idol of my life on the biggest match of my life. It was sort of easier for me to believe that I could win."

Carlos Alcaraz never thought his success would come as quickly as it has, with the 19-year-old becoming the youngest men's world number one in history by defeating Casper Ruud in the US Open final on Sunday.

It was Alcaraz's first grand slam final, and in the process he broke the record for the most cumulative court time at a single grand slam after grinding through three consecutive five-set matches in the lead-up to the four-set final.

This is the third big tournament the Spaniard has won this year. He became the first player born after the year 2000 to win an ATP 1000 Masters event when he beat Ruud at the Miami Open, and then followed it up with a straight-sets win over Alexander Zverev in the Madrid Open final.

Speaking to the media after his maiden major title, Alcaraz called it "crazy" and a "dream".

"Well, it's crazy for me," he said. "I never thought that I was going to achieve something like that at 19 years old – everything has come so fast.

"For me it's unbelievable. It's something I've dreamed since I was a kid, since I started playing tennis. Of course, lifting this trophy today is amazing for me.

"Right now I'm enjoying the moment – I'm enjoying having the trophy in my hands – but, of course, I'm hungry for more. 

"I want to be at the top for many, many weeks – hopefully many years. I'm going to work hard again after this… I'm going to fight for more of this."

With his rapid rise to the pinnacle of the sport, Alcaraz said his victory in Miami was when he realised the path he was on could include grand slam titles.

"Honestly, since I won Miami," he said. "Since I won Miami, I thought I was able to have a grand slam in my hands.

"But before Miami, I was thinking that I have to still grow up. I thought that I'm able to have good results in a grand slam, but not a champion.

"But I would say after Miami – I won great matches in a row – I would say after that I thought that I'm able to win a grand slam."

Casper Ruud was understandably disappointed to miss out on the US Open title and the world number one spot, but he vowed to continue his pursuit of a major breakthrough.

Ruud played his second grand slam final of the season at Flushing Meadows on Sunday, yet that match ended in the same manner as his French Open defeat to Rafael Nadal.

The Norwegian, who would have led the rankings had he taken the title, went down 6-4 2-6 7-6 (7-1) 6-3 to Carlos Alcaraz, who instead himself became the youngest ever number one.

It was the first major final played between two men looking to become number one for the first time.

Ruud was bidding to make the biggest leap to the top of the rankings, having previously been the world number seven.

It was not to be, but the 23-year-old's reward for his form in New York was number two – a fine consolation prize.

"It's tough to explain everything," Ruud said, reflecting on his season. "Things have been going so well. I'm so excited for it.

"Today was a special evening. Both Carlos and I knew what we were playing for, we knew what was at stake.

"It's fun that both finalists would be number two and number one tomorrow. I think it's fitting.

"I'm disappointed, of course, that I'm not number one, but number two is not too bad either. I will continue to chase for my first grand slam and the number one ranking."

Carlos Alcaraz was determined fatigue would not get the better of his US Open title tilt, but he accepted he was "a little bit" tired after defeating Casper Ruud in Sunday's final.

Alcaraz set a grand slam record for the most time spent on court at a single tournament, in large part due to playing five-set matches in the fourth round, quarter-finals and semi-finals.

Still, the 19-year-old had enough energy left to take down Ruud in four sets, with his 6-4 2-6 7-6 (7-1) 6-3 victory making him a first-time major champion and the new world number one.

Asked if he would now acknowledge the effects of this run on him, Alcaraz replied: "A little bit.

"I always say it's not time to be tired in the final round of a grand slam or any tournament; you have to give everything on court, everything you have inside. It's something I work really, really hard on."

Alcaraz is the youngest player to ever sit atop the men's rankings, and he added: "This is something I dreamt of since I was a kid, to be number one in the world, to be a champion of a grand slam.

"It's something I worked really, really hard for. It's tough to talk right now. There's a lot of emotions right now.

"This is something I tried to achieve. All the hard work I did with my team, my family... I'm just 19 years old, so all the tough decisions are with my parents, my team as well. This is something that is really, really special for me."

Carlos Alcaraz defeated Casper Ruud in four sets to win his first major at the US Open and make history in moving to the top of the ATP rankings.

Either Alcaraz or Ruud would have taken the world number one spot had they won at Flushing Meadows, and it was the 19-year-old who prevailed 6-4 2-6 7-6 (7-1) 6-3 on Sunday.

The teenager – the second-youngest New York champion of the Open Era after Pete Sampras – therefore became the youngest ever men's number one.

Alcaraz had come through five-set matches in each of the prior three rounds, and he was again worked hard by Ruud – the new number two.

Ultimately, though, the highly talented Spaniard had the staying power to win his first grand slam title, becoming the first teenager to do so since Rafael Nadal at the 2005 French Open.

Despite the draining efforts of previous nights, Alcaraz made a rapid start, quickly forging three break points in the third game of the match and taking the second of them.

Ruud did little else wrong in the first set but had to bide his time to respond, losing the opener and fending off an opportunity for a break in the second before immediately applying pressure going the other way.

The Norwegian reached an Alcaraz drop shot and lobbed his opponent before watching the backhand reply land long to lead, although three unforced errors in the next game almost let Alcaraz back in.

Instead, Ruud dug in and then profited when a sloppy Alcaraz service game allowed him to clinch the second set.

Alcaraz responded in sublime fashion, immediately piling on the pressure in the third frame and breaking down Ruud's defence with a pinpoint drop shot, yet the set was level again when he crashed into the net, with a sensational rally required to reach a tie-break.

A couple of wild Ruud strokes decided the 73-minute set in Alcaraz's favour, though, and the fifth seed went long in the fourth to set his opponent on course, with an emotional victory secured in ruthless style.

Data Slam: Marathon man Carlos crowned in New York

Only the third player to reach the US Open final after winning in five sets in each of the prior three rounds, Alcaraz avoided seeing another match going all the way – even if past results suggest that would have worked in his favour.

Regardless, Alcaraz set a new record for the most time spent on court at a major tournament. Since 1999, when this data was first available, Kevin Anderson's 2018 Wimbledon run had previously represented the benchmark.

ACES/DOUBLE FAULTS

Alcaraz – 14/3
Ruud – 4/2

WINNERS/UNFORCED ERRORS

Alcaraz – 55/41
Ruud – 37/29

BREAK POINTS WON

Alcaraz – 3/11
Ruud – 3/10

Casper Ruud is looking to follow in the footsteps of compatriot Erling Haaland by putting Norway "on the map" ahead of his US Open final appearance.

Ruud is the first Norwegian male player to appear in the championship match at Flushing Meadows, where he will play Carlos Alcaraz on Sunday, with the winner also set to become the new world number one.

Runner-up to Rafael Nadal at the French Open in June, the fifth seed would become only the fourth player from Scandinavia to top the ATP rankings should he prevail at Arthur Ashe Stadium - after Bjorn Borg, Mats Wilander and Stefan Edberg.

Ruud is not the only Norwegian sportsman to be enjoying an impressive spell of form. Indeed, compatriot Haaland has made a blistering start to life at Manchester City.

The former Borussia Dortmund striker has already scored 12 goals in his first eight appearances across all competitions - including successive hat-tricks - since swapping Bundesliga for the Premier League.

Ruud hailed Haaland's red-hot streak at City, and said he takes immense pride in representing the Norwegian flag every time he steps out onto the court.

The nine-time ATP title winner said: "Erling Haaland has had an unbelievable season so far. And we all hope he keeps going. It's a joy to watch him score goal after goal.

"So, he's obviously the biggest star we have in Norway at the moment, and he'll probably continue to be so for many more years. 

"I'm just focused on my career and hope I can, of course, win more tournaments in my career.

"Everywhere I go, I represent Norway - whenever I play on the ATP Tour or in a grand slam, because the Norwegian flag is always behind or in front of my name.

"So, I want to represent Norway in a good way, and put Norwegian tennis a little bit more on the map than what it's been in previous years.

"I hope I can represent Norway and the Norwegian people in a good way when I'm travelling around and playing, and hopefully winning more matches."

Carlos Alcaraz will "give everything" to win the US Open and become world number one as he prepares to face Casper Ruud in Sunday's final.

Alcaraz overcame home favourite Frances Tiafoe in a thrilling five-set semi-final at Flushing Meadows on Friday, winning 6-7 (6-8) 6-3 6-1 6-7 (5-7) 6-3.

The 19-year-old will take on Ruud for the title after the Norwegian beat Karen Khachanov in four sets earlier in the day.

The honour of becoming world number one will also be on the line for both, after current holder Daniil Medvedev was eliminated in the round of 16 by Nick Kyrgios.

Speaking on-court after his victory against a spirited Tiafoe, Alcaraz said: "To be honest in the semi-final of a grand slam you have to give everything. 

"We have to fight until the last ball. It doesn't matter if we are fighting for five hours, six hours. It doesn't matter. You have to give everything on court. Frances gave everything on court. This is amazing."

The winner of Sunday's final will seal his first career grand slam, while Alcaraz will create history if he wins as it will make him the youngest world number one since the ATP rankings began in 1973.

It will be the Spaniard's first grand slam final, while his opponent appeared in a losing effort to Rafael Nadal in June's French Open final.

Alcaraz will need to recover from his third consecutive five-set match at the US Open, but insisted he will "give everything" to win.

"It's amazing to be able to fight for big things. First time in the final of a grand slam. I can see the number one in the world, but at the same time it's so far away," Alcaraz added.

"I have one more to go against a player who is unbelievable. He deserves to play a final. He played the final of a grand slam in Roland Garros. This is my first time. 

"I'm going to give everything that I have. I will have to handle the nerves of being in a final of a grand slam, but obviously I'm really, really happy and as I said before every match, I'm going to enjoy the moment."

Frances Tiafoe insisted he will return and win the US Open "one day" after coming up short in an enthralling five-set semi-final against Carlos Alcaraz.

The home favourite won the first and fourth sets on tie breaks, only to lose the decider as his 19-year-old opponent sealed a 6-7 (6-8) 6-3 6-1 6-7 (5-7) 6-3 victory on Friday.

Tiafoe was emotional after his loss as an appreciative crowd at Flushing Meadows acknowledged his efforts.

"I gave everything I had," he said during his on-court interview. "Too good from Carlos tonight.

"I gave everything I had for the last two weeks. I came here wanting to win the US Open and I feel I let you guys down."

The 24-year-old had an impressive run in the tournament, beating higher seeds Diego Schwartzman, Rafael Nadal and Andrey Rublev to reach the final four.

"This one hurts. This one really, really hurts," he added. "Too good from Carlos, you're gonna win a lot of grand slams, you're a hell of a player, hell of a person.

"I'm happy I got to share the court and such a big stage with you. 

"I'm going to come back and I will win this thing one day. I'm sorry guys."

Alcaraz will face Casper Ruud in Sunday's final after the Norwegian beat Karen Khachanov in four sets in Friday's other semi-final.

Casper Ruud called facing off against Carlos Alcaraz in the US Open final with the world number one ranking also on the line "the ideal situation" after successfully navigating the challenge of Karen Khachanov in Friday's semi-final.

Ruud needed just over three hours to defeat the Russian 7-6 (7-5) 6-2 5-7 6-2, becoming the first Norwegian man to ever reach the US Open final.

With Alcaraz outlasting Frances Tiafoe in a five-set battle of attrition, the 23-year-old Ruud and 19-year-old Alcaraz will both be seeking their first ever grand slam title in Sunday's decider.

Speaking to the media before Alcaraz's match, Ruud said he hoped it would be the Spaniard who made it through so they could play off for the number one ranking.

"I think what's most fair is if we both reach the final and whoever wins the final reaches the world number one," he said. "That would be, I think, the ideal situation."

He then dove into some strategy about what it takes to beat the teenage sensation, saying "I will seek my revenge" for the two losses he has suffered at the hands of Alcaraz in Miami and Marbella this season, both in straight sets.

"I think if I want to beat Carlos, I'll need to play very precise with all the shots that I hit," he said. "Especially trying to keep him a little bit further back in the court, to play with good depth and length on all my shots.

"If he steps in, he can do anything with the ball. He can rip a winner. He also has great touch with the dropshot. I think he has one of the best dropshots on tour. He can do both shots back and forth, it will sort of get you off guard sometimes with the dropshot.

"If you play with good depth and good length, it's tougher to hit dropshots. That will be something that I will try to focus on.

"We're playing for the tournament and also to be world number one – of course, there will be nerves and we will both feel it. 

"I hope it will be a good match. He has beaten me a couple times and I will seek my revenge."

One advantage Ruud will have over Alcaraz is the fact that this is not his first rodeo, having made the French Open final this year where he lost to Rafael Nadal, but he feels that experience can only help him.

"I mean, Roland Garros, the final, [Nadal] obviously gave me a good beating," he said. 

"After the final I said, If I ever reach one again, I hope it is not Rafa on the other side of the court in Roland Garros because it's sort of an impossible task I think for any player. I'm happy that it's not Rafa on clay.

"I hope it can have prepared me a little bit. At least I know a little bit of what I'm facing when I'm stepping on the court, seeing the trophy on the back of the court, seeing tons of celebrities. 

"Even in Roland Garros, there was royal families there watching. That was a little bit of a new experience for me – I hope I can be more ready for that on Sunday."

Carlos Alcaraz is having a remarkable breakthrough season, and he has a chance to put an exclamation point on it after defeating Frances Tiafoe 6-7 (6-8) 6-3 6-1 6-7 (5-7) 6-3 in Friday's US Open semi-final.

It will be 19-year-old Alcaraz's first appearance in a grand slam final, and with a win against Casper Ruud he will also become the youngest world number one in men's tennis history, beating out Lleyton Hewitt (20 years and nine months old) by over a year.

In a tight first set where both players failed to capitalise on their break point opportunities, Tiafoe saved an Alcaraz set point to force the tiebreaker, where he would finally secure the opening frame with the fourth set point of his own.

With such fine margins deciding the outcomes, some sloppy serving would flip the script in the second set. After Tiafoe had no double faults in the first and Alcaraz had three, it was Alcaraz cleaning things up to post zero for the rest of the match.

Meanwhile, Tiafoe had a pair of costly double faults in the second, which ultimately led to the only break in the set, as Alcaraz converted one of his four opportunities, while saving the three break points he faced.

Tiafoe's vaunted serve continued to meltdown in the third frame, dropping his first-serve accuracy from 67 per cent to 30 per cent, which led to him winning just 35 per cent (seven-of-20) of his service points as Alcaraz lifted.

Alcaraz needed only 34 minutes to wrap up the third set, thanks in large part to Tiafoe committing 12 unforced errors with only six winners, as the Spaniard finished the set with just one ace and four winners.

As the double faults and unforced errors faded away, Tiafoe rediscovered the kind of form and fight that saw him stylishly handle the challenge of Rafael Nadal earlier this week. Tiafoe and Alcaraz traded breaks in four consecutive games in the fourth set, with the American having to save a match point to force another tiebreaker where he would prevail.

But Alcaraz would not be denied, grabbing a crucial break in the opening game of the fifth set, and when Tiafoe snatched it back, his joy was short-lived as Alcaraz re-broke in the very next game to-love, and once more to finish the match.

Data Slam: Alcaraz way ahead of schedule

If he defeats Ruud in the final, Alcaraz will become the second-youngest men's US Open champion ever at 19 years and four months old, trailing only Pete Sampras (19 years, 28 days). 

Both the third and fourth-youngest champions – Oliver Campbell (19 years, six months) and Richard Sears (19 years, 10 months) – won their titles in the late-1800s. 

ACES/DOUBLE FAULTS

Alcaraz - 6/3

Tiafoe - 15/6

WINNERS/UNFORCED ERRORS

Alcaraz - 59/37

Tiafoe - 51/52

BREAK POINTS WON

Alcaraz - 9/20

Tiafoe - 3/7

Casper Ruud is through to his second career grand slam final after emerging triumphant 7-6 (7-5) 6-2 5-7 6-2 in Friday's semi-final against Karen Khachanov.

Ruud, 23, will be searching for his first major title after losing to Rafael Nadal in the French Open decider in June, and he will face the winner between Carlos Alcaraz and Frances Tiafoe.

By defeating Khachanov, Ruud has now won 13 of his past 15 matches, and while it is usually his return game that dictates his effectiveness, against the Russian it was about his ability to win points on serve.

A tight first set saw the two players exchange breaks, securing two each before Ruud took the only point against serve in the tie-break

Whatever he figured out in the breaker carried into the second set, as he did not drop a single point (16-of-16) while serving in the frame. In a near-perfect set, Ruud tallied 12 winners and two unforced errors, while Khachanov shot himself in the foot with three double faults.

With his back to the wall, Khachanov responded well in the third, finding his range with his ground strokes to post 15 winners and four unforced errors, while winning 83 per cent (24-of-29) of his service points.

But that would be his last piece of resistance before Ruud took over down the stretch, rattling off five consecutive games in the fourth set to turn a 0-1 deficit into a 5-1 lead, serving it out to love.

Data Slam: Ruud reaches new heights

Ruud is guaranteed to leave the US Open with a new career-high ranking, and with a win in the final, he will become world number one first the first time.

The only player with a chance to overtake him this week in the race for the number one spot is Alcaraz.

WINNERS/UNFORCED ERRORS

Ruud – 52/34

Khachanov – 43/39

ACES/DOUBLE FAULTS

Ruud – 10/1

Khachanov – 15/3

BREAK POINTS WON

Ruud – 6/13

Khachanov – 3/5