New York Yankees manager Aaron Boone said he is feeling "great" and hopes to re-join the team over the weekend following surgery.

Boone had an operation to receive a pacemaker at St. Joseph's Hospital in Tampa, Florida on Wednesday.

The 47-year-old underwent open-heart surgery in 2009.

"I feel great. I can't believe how good I feel," Boone said on Friday.

"It makes me really glad that I got this done because, certainly in the last couple of months, I have not felt anywhere close to how I felt this morning. Really excited about it; excited to get back."

On a return, Boone added: "I can say a couple days in now, me and my new buddy are doing quite well."

"If not tomorrow [Saturday], I'm hoping for Sunday," he continued.

Boone has been Yankees manager since 2018, leading the storied franchise to the American League Championship Series (ALCS) in 2019, while they lost in the AL Division Series (ALDS) last year.

The former third baseman was an All-Star with the Yankees in 2003.

"Now that I've got [the pacemaker] it's made me realise that I wasn't feeling good, just energy level, just not myself. I felt like I had to reach for it every day in a way," Boone said.

"And yesterday [Thursday] and even more so today, I just feel kind of ready to go and ready to kind of tackle things. [My cardiologist] said, 'this will be a pretty straightforward simple procedure, nothing like you've been through in the past. And it'll work right away, you'll notice it.' And he was right. I feel great."

Yankees general manager Brian Cashman said: "I don't know the exact time of his procedure [Wednesday] afternoon, but in the 7:10pm range, I get a FaceTime. And it's Aaron Boone. I pick up and the energy, how good he looked, the personality was so vibrant. And I'm like, 'Wow.'

"For him to have to go under, have this procedure, and within an hour or so he's back up and running as if nothing really happened at all, it was incredible. I know he's chomping at the bit to get back into that dugout, back into the Yankee uniform. But the greatest thing is that he just feels amazing. The newer version of him, I'm happy for him and happy for his family and happy for us."

The star-studded Yankees will open their 2021 season against American League (AL) East rivals the Toronto Blue Jays on April 1.

Andrey Rublev was pushed hard by Jeremy Chardy on Friday but eventually secured his 18th successive ATP 500 win to set up a semi-final meeting with Stefanos Tsitsipas at the Rotterdam Open.

Chardy managed to save match points in the second set, as Rublev wobbled at the crucial moment, but the Russian got the job done 7-6 (7-2) 6-7 (2-7) 6-4.

The pair were on court for just under two hours and 40 minutes and racked up a considerable number of winners, with Rublev's 44 eight more than the Frenchman.

His 18-match winning streak in ATP 500 events has only been bettered on five previous occasions since 2009, all of which were achieved by Andy Murray, Rafael Nadal or Roger Federer, who holds the record of 28 successive victories.

If he is to get any closer to Federer's remarkable haul, Rublev will have to go beyond Tsitsipas, but Friday's match took plenty out of him.

"I will try to do as much as I can to be ready for [the semi-final]… Stefanos also had two tough matches [this week]," said Rublev.

"He had three sets [on Thursday] and today he had three sets. Now he has to play doubles. It is not easy."

As Rublev alluded to, Tsitsipas certainly did not have it all his own way against another Russian, Karen Khachanov, coming from a set down to win 4-6 6-3 7-5.

Tsitsipas also had to contend with being 3-1 down in the third set – but Rublev knows all about the Greek's ability to come back from the brink having lost to him in last year's ATP Finals despite having match point.

"He [Khachanov] was playing great tennis and I wasn't sure if I would be able to compete," Tsitsipas said after the contest.

"I had an amazing 5-0 lead in the second set and that brought a lot of confidence into my game. We had great rallies and the quality of tennis was excellent. You need to stay as calm as possible in three-setters. I have won a lot in the past and with experience, it gives me an idea of how to play in these tight moments."

Borna Coric and Marton Fucsovics will go head-to-head in the other semi-final.

Croatian Coric came through in straight sets against Kei Nishikori, though it was by no means a straightforward victory as he was pushed to tie-breaks in both sets, winning 7-6 (7-2) 7-6 (7-4).

Fucsovics saw off Tommy Paul 6-4 6-3 to reach the last four.

Blake Griffin could be set to swap the team sitting at the bottom of the Eastern Conference standings for a potential title contender after agreeing a contract buyout with the Detroit Pistons. 

Stories on Friday of a parting of the ways between the Pistons and Griffin hardly came as a surprise, considering he had not featured for the team in their previous 10 games prior to the All-Star break. 

Both parties agreed for the 31-year-old to be held off the active roster as the franchise worked towards a solution over his playing future.

With no trade able to be worked out, a settlement has instead been reached with Griffin – whose contract was due to run until the end of the 2021-22 season – that will see him become a much-coveted free agent. 

"Blake has been a great representative for our franchise and for the city of Detroit," Pistons owner Tom Gores said in a statement.

"His work ethic and his approach to the game contributed a lot to our culture. He has been a consummate pro and we wish him continued success. I'm grateful for everything he did for our team and for our community."

Now the six-time All-Star waits to see what offers come his way. According to Adrian Wojnarowski of ESPN, the Brooklyn Nets, Golden State Warriors, Miami Heat and Portland Trail Blazers are among those interested.

Griffin had averaged 12.3 points per game while shooting 36.5 per cent in his 20 outings for Detroit, who have found wins hard to come by in the 2020-21 campaign. 

Those figures are well down on his career numbers, though. After 642 games, he averages 21.4ppg, as well as 8.7 rebounds and a field goal percentage of 49.5 per cent. The only area of improvement this season has been free-throw success, landing 71 per cent compared to 69.5 per cent overall.

Selected with the first overall pick in the 2009 draft, Griffin spent his first eight seasons in the league with the Los Angeles Clippers, though his debut campaign was a write-off due to injury. 

However, he was named Rookie of the Year in 2011 after playing in all 82 games, making his first All-Star appearance and also winning the dunk contest. Further injury issues hampered his progress, yet the Clippers still gave him a five-year, $173million contract in July 2017. 

Just six months later, he was traded to the Pistons. Griffin was the leading piece in a six-player deal that also saw Detroit give up protected draft picks to acquire the power forward. 

Blake Griffin could be set to swap the team sitting at the bottom of the Eastern Conference standings for a potential title contender after reportedly agreeing a contract buyout with the Detroit Pistons. 

Stories on Friday of a parting of the ways between the Pistons and Griffin hardly came as a surprise, considering he had not featured for the team in their previous 10 games prior to the All-Star break. 

Both parties had agreed for the 31-year-old to be held off the active roster as the franchise worked towards a solution over his playing future.

With no trade able to be worked out, a settlement has instead been reached with Griffin – whose contract was due to run until the end of the 2021-22 season – that will see him become a much-coveted free agent. 

Now the six-time All-Star waits to see what offers come his way. According to Adrian Wojnarowski of ESPN, the Brooklyn Nets, Golden State Warriors, Miami Heat and Portland Trail Blazers are among those interested.

Griffin had averaged 12.3 points per game while shooting 36.5 per cent in his 20 outings for Detroit, who have found wins hard to come by in the 2020-21 campaign. 

Those figures are well down on his career numbers, though. After 642 games, he averages 21.4ppg, as well as 8.7 rebounds and a field goal percentage of 49.5 per cent. The only area of improvement this season has been free-throw success, landing 71 per cent compared to 69.5 per cent overall.

Selected with the first overall pick in the 2009 draft, Griffin spent his first eight seasons in the league with the Los Angeles Clippers, though his debut campaign was a write-off due to injury. 

However, he was named Rookie of the Year in 2011 after playing in all 82 games, making his first All-Star appearance and also winning the dunk contest. Further injury issues hampered his progress, yet the Clippers still gave him a five-year, $173million contract in July 2017. 

Just six months later, he was traded to the Pistons. Griffin was the leading piece in a six-player deal that also saw Detroit give up protected draft picks to acquire the power forward. 

Petra Kvitova ended the run of qualifier Jessica Pegula to set up a 2018 final rematch against Garbine Muguruza at the Qatar Open. 

Kvitova saw off Pegula in straight sets, triumphing 6-4 6-4, meaning she will be involved in the final of the tournament for a third time in four years. 

Having twice let slip breaks in the opener, the 2020 runner up edged ahead again at 5-4 before serving out for a 1-0 lead. 

Pegula appeared set to draw level when she raced 3-0 ahead in the next, only to be pegged back by Kvitova, who hit 26 winners and the same number of unforced errors. Victory was eventually sealed after one hour and 18 minutes on court. 

The two-time Wimbledon champion secured the trophy in Doha three years ago by beating Muguruza, who did not even have to hit a ball to progress on Friday after opponent Victoria Azarenka withdrew from their semi-final due to a back injury. 

That title showdown in 2018 went the distance, Kvitova rallying after losing the opening set to eventually prevail. 

"I think it's going to be a tough match," Muguruza said, according to the WTA Tour's official website.  

"We played here in another final three years ago, so just looking forward to playing that match and hopefully getting the trophy." 

The Spaniard has been in impressive form this week, ending Aryna Sabalenka's hopes of defending her crown in the last 16 before thrashing Maria Sakkari in a lopsided quarter-final.

Meanwhile, in Friday's action at the Lyon Open, second seed Fiona Ferro rallied from a set down to beat fellow Frenchwoman Clara Burel and reach the semi-finals. 

Ferro's 2-6 6-1 6-3 triumph means she is certain to break into the top 40 in the world for the first time in her career.  

The only other seed left in the draw is Paula Badosa, the Spaniard knocking out Kristina Mladenovic. Her reward is a last-four clash with qualifier Clara Tauson, conqueror of Camila Giorgi in straight sets. 

George Russell hopes Williams can make a flying start to the Formula One season in Bahrain - but he believes Mercedes are the only team who will be sure they are race-ready.

British driver Russell caught the eye when he replaced Lewis Hamilton at Mercedes for one race last year, after the world champion tested positive for COVID-19 and missed the Sakhir Grand Prix.

He went close to winning that race until a pit-stop error and a puncture late on cost him a probable victory, and he then returned to his regular drive at Williams.

Mercedes have assured Russell, who is part of their junior driver programme, that he can have a racing future with them if his development continues as expected.

That could come as soon as next year, but for now Russell's focus is on delivering for Williams.

The team has been in transition following the takeover by Dorilton Capital, and German motorsport veteran Jost Capito was appointed chief executive officer during the close season.

Russell believes Williams, who failed to score a point last season, should be better placed in 2021 to at least improve on that disappointing outcome.

"We want, the bare minimum, to be fighting with the Haas and the Alfas, as we did last year, and closing the gap to that midfield," Williams said.

"We made nine out of 17 Q2 appearances and that is definitely a thrill. That's got to be almost an aim every weekend for myself and team."

The season begins in Bahrain on March 28, and by then there should be evidence of which teams have made progress since 2020, with testing taking place, also in Bahrain, on the March 12-14 long weekend.

Russell admits it is a waiting game to see how rivals have advanced, or regressed.

"Fingers crossed that they go backwards and we go forwards," he said, in an Instagram chat on Formula One's official page. 

"Ultimately, we may go to Bahrain and see every other team has progressed more than us.

"We may go there and see we've made great progress. Until we get to Bahrain not a single team, probably bar Mercedes, can tell you how they're going to perform."

Russell, 23, has been tipped for a big future in the sport. He also believes Williams, a great name from the history of Formula One, can begin a journey back to the top of the sport.

"The arrival of Jost is massive for the team, really exciting," he said. "The future for Williams and everybody here at Grove [the team's headquarters] is really great.

"Unfortunately, things don't change in a matter of moments in Formula One, but the building blocks are really getting set in stone.

"Jost has loads of experience, he's a great character, and I think he's going to bring a lot of motivation to the team."

Russell was speaking on the day F1 chiefs confirmed the Portuguese Grand Prix on the new season's calendar, with the race inked in for May 2.

It will be the second round of 23 in the championship, with Portugal having returned to the Formula One rota last year for the first time since 1996.

George Russell has no intention of "hassling" Mercedes over his future as he focuses on trying to get the most out of a new-look Williams car in 2021.  

The British driver is heading into the final year of his contract with Williams, where he will once again work alongside Nicholas Latifi for the season.  

It will be a third year for Russell with the team, though he did step in to drive for Mercedes - having previously been part of their junior driver programme - at the 2020 Sakhir Grand Prix, replacing Lewis Hamilton after the seven-time world champion tested positive for COVID-19. 

His performance in the race - he was in front for the majority before a slow puncture forced him to settle for ninth place - led to speculation over a permanent switch, but Hamilton and Valtteri Bottas have remained together.  

While a move could still happen at some stage further down the line, Russell is relaxed over his standing within Mercedes.  

"Mercedes and Toto have always had my back and believed in me from day one. When they believe the time is right, the time will be right," he told Sky Sports at the launch of Williams' FW43B car.  

"I'm not hassling them, I’m just going out there and doing my job on the track. What comes in the future will come.  

"Obviously I had a great opportunity in Bahrain last year, but for now we will focus on the job here at Williams for this season and trying to get the most out of it."

In a somewhat surprising move, Hamilton only agreed to a one-year extension earlier this year, committing him to a ninth season with Mercedes.

Bottas' deal runs "at last until the end of 2021", per the team's statement when the Finn's future was revealed last August, so Russell could potentially be considered to replace either driver in 2022.

"Every driver wants to put themselves against the best," he said when asked if forming a partnership with Hamilton appealed to him.

"I believe in myself and Lewis is the benchmark at the moment, but equally you have a lot of fantastic drivers out there who might not have the same CV as Lewis.  

"Max [Verstappen], Charles [Leclerc], Lewis – they are all on the same level. Putting yourself against one of those three would be great for any driver."

Williams - now owned by Dorilton Capital - unveiled a new blue, white and yellow livery on Friday that takes inspiration from the team's successful cars in the 1980s and 1990s.

Wing wizard Jona Nareki ran in a hat-trick as the Highlanders recovered from a 14-point deficit to sink the Chiefs 39-23 in Hamilton.

The result meant the Chiefs lost a 10th successive game, and they will scarcely have better opportunities to get back to winning ways in Super Rugby Aotearoa, having led 20-6 inside half an hour of this contest.

Yellow cards for Sio Tomkinson and Ash Dixon hindered the Highlanders early on, and tries from Luke Jacobson and Damian McKenzie put the Chiefs apparently in charge.

Nareki had other ideas, though, and when the 23-year-old sprinted 90 metres from deep inside his own 22 to score, it was an ominous warning of what was to come.

Folau Fakatava cut further into the narrowing deficit 10 minutes into the second half, darting over from close range, and then Nareki took over, firstly with a lung-busting dash through midfield that ended with him feeding Shannon Frizell to power over the line.

Nareki himself raced over in the right corner for his second try in the 57th minute, showing great pace but also the nimblest of footwork to scythe through the Chiefs defence.

He got in again in the 69th minute, this time on the left, beating a desperate last-ditch attempted tackle to dot down in the corner and complete the hat-trick.

Josh Ioane added the extras to four of the Highlanders' five tries and added a pair of penalties, with the Chiefs left wounded by a brutal setback.

Giannis Antetokounmpo is confident of ending his wait for a first NBA All-Star Game win after learning of his Team LeBron team-mates.

Milwaukee Bucks superstar Antetokounmpo is making his fifth All-Star appearance this week but has ended on the losing side on all four prior occasions.

The two-time MVP was a team captain in the previous two years but was on the board this time and selected first by LeBron James.

Only once previously, in Antetokounmpo's All-Star bow in 2017, have the pair appeared together. The 'Greek Freak' led the team in scoring with 30 points, but they came up short.

That miserable record will come to an end in Atlanta in 2021, though, according to Antetokounmpo.

Alongside the Bucks forward, James took Luka Doncic, Nikola Jokic and Stephen Curry as starters to produce an exciting blend of size and shooting.

"That's the starting five? Yeah, it's over guys," Antetokounmpo said. "Me, LeBron, Luka, Jokic and Steph? Man, that's a good starting five."

While Antetokounmpo is yet to taste victory at the annual event, James has three straight wins as captain of Team LeBron since the move away from the previous East versus West format in 2018.

The Los Angeles Lakers veteran is a three-time All-Star Game MVP and his newest team-mate is looking forward to linking up.

"He just makes plays," Antetokounmpo said of James. "Most of the time you're just wide open and I've never been used to that with somebody else creating the attention and me being wide open all the time.

"So, I've just got to do my job, make the right play, too, and do what I always do: just play hard and hope I can help him get a win."

Antetokounmpo was speaking after posting 26 points, 11 rebounds, eight assists, two steals and a block in Milwaukee's dramatic 112-111 win over the Memphis Grizzlies.

Damian Lillard posted 44 points for the Portland Trail Blazers in a 123-119 win over the Sacramento Kings before the NBA All-Star break.

Lillard shot eight three-pointers in a dominant display, while he scored 10 straight points down the stretch to help take down the Kings on Thursday.

Portland's Lillard is the first NBA player to hit a game-winning field goal while trailing in the final 15 seconds one day and then follow that up with a 40-point game the next day since Los Angeles Lakers great Kobe Bryant did it on January 31 and February 1 in 2010, according to Stats Perform.

Trail Blazers team-mate Enes Kanter provided support with 22 points and 21 rebounds in a dominant double-double display.

According to Stats Perform, it is the first time in franchise history the Trail Blazers have had a player with 40-plus points and another with 20-plus points and 20-plus rebounds in the same game.

Elsewhere, Ja Morant and Jrue Holiday traded clutch buckets in the final 10 seconds, with the latter earning the Milwaukee Bucks a game-winning lead with two seconds remaining in their thrilling112-111 win over the Memphis Grizzlies.

Two-time reigning MVP Giannis Antetokounmpo, who was the first pick by Team LeBron for Sunday's All-Star Game in Atlanta, fuelled the Bucks by scoring 26 points, 11 rebounds and eight assists.

Lowry ties Raptors record

The depleted Toronto Raptors lost 132-125 to the Boston Celtics, but Kyle Lowry impressed. The veteran guard finished with 14 points and 19 assists. He tied a franchise record with his 19 assists, matching Damon Stoudamire (1996) and Jose Calderon (twice). Chris Boucher led the way with 30 points in the absence of stars Pascal Siakam and Fred VanVleet, as well as head coach Nick Nurse and other players and stuff due to the league's health and safety protocols. Boston's Jayson Tatum starred with 27 points, 12 rebounds and five assists as the Celtics claimed their fourth win a row.

Bradley Beal (33 points and seven rebounds) and Russell Westbrook (27 points, 11 assists and nine rebounds) were exceptional as the Washington Wizards produced a big second-half performance to knock off the Los Angeles Clippers 119-117. The Clippers were without Paul George.

MVP candidate Nikola Jokic put up 20 points and 12 rebounds in the Denver Nuggets' 113-103 win at the Indiana Pacers.

The New York Knicks topped the Detroit Pistons 114-104 behind Julius Randle's double-double of 27 points and 16 rebounds, while he also tallied seven assists.

Shai Gilgeous-Alexander's 33 points and eight assists inspired the Oklahoma City Thunder to a 107-102 win against the San Antonio Spurs.

Brogd-off day

Pacers guard Malcolm Brogdon had a night to forget in his side's loss to the Nuggets, which leaves Indiana 16-19 and slipping from playoffs contention in the Eastern Conference. Brogdon finished with 10 points from 34 minutes on court, shooting at four-of-14 from the field, while he missed all five of his three-point attempts.

Hart's half-courter

LeBron James selected two-time reigning MVP Giannis Antetokounmpo with his number one pick for the NBA All-Star Game, while Kevin Durant drafted Brooklyn Nets team-mate Kyrie Irving.

On Thursday, team captains James and Durant filled out their rosters for Sunday's All-Star contest in Atlanta.

Los Angeles Lakers superstar James and Milwaukee Bucks forward Antetokounmpo often go head-to-head in the All-Star Games as respective captains, but that is not the case this year.

Antetokounmpo will team up with James, who also selected Golden State Warriors star Stephen Curry, Dallas Mavericks guard Luka Doncic and the Denver Nuggets' MVP candidate Nikola Jokic as starters.

Team LeBron's reserves are Damian Lillard (Portland Trail Blazers), Ben Simmons (Philadelphia 76ers), Chris Paul (Phoenix Suns), Jaylen Brown (Boston Celtics), Paul George (Los Angeles Clippers), Domantas Sabonis (Indiana Pacers) and Rudy Gobert (Utah Jazz).

Durant – sidelined as he nurses a hamstring injury – turned to Brooklyn star Irving with the second overall pick in the All-Star draft.

MVP candidate and 76ers star Joel Embiid, Clippers forward Kawhi Leonard, Washington Wizards sharpshooter Bradley Beal and Jayson Tatum of the Celtics are the other starters for Team Durant.

The reserves drafted by Durant are James Harden (Nets), Devin Booker (Suns), Zion Williamson (New Orleans Pelicans), Zach LaVine (Chicago Bulls), Julius Randle (New York Knicks), Nikola Vucevic (Orlando Magic) and Donovan Mitchell (Jazz).

Team LeBron have won the past three All-Star Games after topping Team Giannis 157-155 in Chicago last year.

UFC president Dana White believes "there's still a chance" Khabib Nurmagomedov will come out of retirement to fight in the octagon.

Khabib stunningly announced his retirement after beating Justin Gaethje to defend the lightweight title at UFC 254 in October last year as he improved to 29-0, though the 32-year-old remains the champion.

White has retained hope of Khabib returning to the UFC, previously talking up the Russian trying to reach a flawless 30-0 record.

Conor McGregor continues to eye a Khabib showdown, while Dustin Poirier – who stunned the former via TKO at UFC 257 – has declared himself the champion.

Speaking ahead of UFC 259, White told reporters he is set to meet with Khabib.

"We're going to have dinner on Saturday or Sunday and just talk and see," White said.

"I think a lot of these fights have to play out in that division. From [number nine] all the way up to number one, they're incredible fights. You can mix or match them any way you want and they're really good fights."

White added: "Let some of these play out to see who will fight next for the title. I think if Khabib is interested, he'll take the fight.

"You don't see Khabib saying, 'Leave me alone. Stop asking me'. So there's still a chance. That's the way I look at it."