Liverpool's teenager midfielder Stefan Bajcetic has signed a new long-term contract with the club.

The 18-year-old arrived from Celta Vigo in late 2020 and has worked his way through to the first-team picture at Anfield.

Having trained with the senior team ahead of the 2022-23 season, Bajcetic has 10 appearances to his name this term.

His breakthrough performances have seen him earn a fresh deal with Jurgen Klopp's men, and Bajcetic acknowledges he is enjoying a campaign that has outperformed his expectations.

"It's crazy [how quickly things have happened]," he told the club's official website. "A year ago I was playing Under-18s football, and now I've started some games [and] made my debut.

"[I have] even scored a goal. That was something I never expected to happen this year. It's amazing to see how fast it went.

Bajcetic made his senior debut in late August during the Reds' 9-0 rout over Bournemouth in the Premier League.

He has gone on to make several more appearances in the top flight for Liverpool, while he was also a goalscorer in their Boxing Day win over Aston Villa.

His renewal marks the latest piece of business for Klopp's side, who signed Cody Gakpo from PSV in their only major transfer of the mid-season window.

Liverpool will be in FA Cup action this weekend with a fourth-round trip to Brighton and Hove Albion on Saturday.

Gareth Southgate described the England manager job as "the greatest privilege" of his life and said he wanted to make sure he was "fresh and hungry" before committing to remain in the role after the Three Lions' World Cup exit.

A year-and-a-half on from reaching the Euro 2020 final on home turf, England were edged out 2-1 in the quarter-finals of Qatar 2022 by France.

The tournament nevertheless marked a turnaround in form for the Three Lions after a dismal Nations League campaign, underlining Southgate's record in his role.

But the former Middlesbrough boss acknowledged he needed time to ensure he made the right call in choosing to remain on board.

"I never want to be in a position where my presence is affecting the team in a negative way," he told BBC Sport.

"I didn't believe that was the case, but I just wanted a period after the World Cup to reflect and make sure that was still how it felt."

"Is it the right thing to keep taking this project on? I wanted to make sure I'm still fresh and hungry for that challenge. [It is] the greatest privilege of my life.

"The quality of performances and the progress that we're making [shows] the team [is] still improving. We're all gaining belief in what we're doing."

England face a banana-skin qualification pathway for Euro 2024, with defending champions Italy, Ukraine, North Macedonia and Malta in their group.

The Three Lions will play the former two sides in March as they begin their campaign working towards next year's tournament in Germany.

Jofra Archer is poised to return to international cricket with England on Friday as Jos Buttler's team tackle South Africa in the first of three ODIs.

The 27-year-old fast bowler has been building up form and fitness by playing for MI Cape Town in the SA20 series, having played no international cricket since March 2021 due to injury.

Major elbow and back problems put Archer's blossoming career on hold, but he is back now.

Although Archer is only around 80 per cent of the way through his recovery, by his own estimation, all that is lacking is "fine-tuning", he said this week.

This is music to the ears of captain Jos Buttler, who said on Thursday: "It's great to have Jofra back, fit and playing cricket again. He's such an exciting guy to have back on the field. As an England captain, to have him back in your squad and in your team is brilliant.

"He's only just coming back to competitive cricket, this will be his first international game for a long time, so there's always going to be a level of expectation on Jofra because we all know what he's capable of. But I'm sure he's just going to get better and better as he comes back and gets back to performing at such a high level."

Buttler says Archer may need "a little bit of time" to fully return to where he was before injuries began to take their toll.

But at the start of a World Cup year, with England preparing to defend their 50-over title in India in October and November, Buttler said: "It's just fantastic to see him fit and back playing again."

Ahead of the opening match in Bloemfontein, England know a 3-0 series win would see them jump back above India to the top of the ODI rankings.

Former skipper Kevin Pietersen made an appearance at the team's training session on Thursday, with England looking to get back to winning ways after failing to win any of their last three ODI series, losing to Australia and India and drawing at home against South Africa.

The Proteas continue to be led by Temba Bavuma, and this series could be a key one in terms of his future as white-ball captain.

A shock defeat to the Netherlands knocked South Africa out of the T20 World Cup in November, with Bavuma signalling he will concur with whatever decision is made about the team's future leadership.

Rob Walter is due to take over as coach of the ODI side from the start of February, with Shukri Conrad overseeing this series.

"If the team wants to go in a different direction with a different leader, I am happy to step away," Bavuma said. "Ultimately it's up to the coach. We have got a new coach now and might be a new coaching staff.

"The coach will have his vision and he will need someone to drive that vision. At the moment the coach has entrusted me with that role, so I will continue doing my best. I'm fortunate I have got a bunch of guys that support me. For me, it's business as usual for now."

Milestone in sight for Roy

England batter Jason Roy is seven away from reaching 4,000 runs in ODIs. If he reaches the milestone in his first match of this series, his 105th innings, it would make him the second-fastest player to achieve it for England, Joe Root got there quicker than anyone, in just 91 innings.

Parnell on brink of century

Wayne Parnell, set to win a 70th ODI cap, will be hoping to complete 100 scalps in the 50-over international game during this series. He is on 97 at present and can become the 13th player to reach 100 wickets in the format for the Proteas. He has taken three or more wickets in three ODIs against England, including his career-best figures of 3-48, all the way back in November 2009.

The Dallas Cowboys have confirmed the exit of six members of their staff roster, including assistant head coach Rob Davis and offensive line coach Joe Philbin.

The Texas franchise saw their NFL season come to a close in a 19-12 loss to the San Francisco 49ers in the NFC Divisional round last weekend.

That has signalled the start of an offseason shuffle among head coach Mike McCarthy's ranks, with half-a-dozen faces among those who will depart the team.

Alongside Davis and Philbin, running backs coach Skip Peete, defensive assistant George Edwards, analytics coach Kyle Valero and assistant defensive line coach Leon Lett are also leaving.

"We thank these men for their hard work, dedication and contributions to the Cowboys," McCarthy issued in a statement.

"Each of them represented our team and organisation at a high, professional level with class and commitment to making our team better.

"These were difficult decisions to make because of the great respect I have for each of them as a coach and person of character, combined with the experiences we've all gone through together.

"This is the hardest part of the business, and we wish them nothing but the best."

With a 12-5 winning record in the regular season, the Cowboys finished second in the NFC East behind the Philadelphia Eagles.

They defeated the Tampa Bay Buccaneers in a resounding 31-14 Wild Card round victory to start their postseason campaign, but will now continue their wait for a first Super Bowl appearance since the 1995 season.

Real Madrid have called on authorities to hold those responsible for the abuse of Vinicius Junior to account.

Madrid host rivals Atletico Madrid in a Copa del Rey encounter on Thursday.

In the build-up to the match, pictures were shared on social media showing a mannequin, wearing a Vinicius shirt, hung by the neck from a bridge in the Spanish capital.

This was condemned by Atleti, who released a statement saying: "Such acts are absolutely repugnant and inadmissible and shame society. Our condemnation of any act that attacks the dignity of persons or institutions is categorical and unreserved."

Madrid have now joined their neighbours in condemning what they label as a "repugnant act of racism, xenophobia and hatred".

A statement read: "Real Madrid would like to thank you for the support and expressions of affection received after the regrettable and repugnant act of racism, xenophobia and hatred against our player Vinicius.

"We would like to express our strongest condemnation of these acts which are an attack on fundamental rights and the dignity of people, and which have nothing to do with the values that football and sport represent.

"Attacks such as those suffered by our player, or those suffered by any sportsperson, have no place in a society such as ours

"Real Madrid trust that those who have participated in such a despicable act will be held accountable."

The Confederacao Brasileira de Futebol (CBF) also joined in the condemnation.

"The CBF vehemently repudiates the racist acts suffered once again by Vinicius," a statement read.

"Intolerance and discrimination are not part of sport and must be eliminated from society. We hope that those responsible are identified and punished under the law."

LaLiga called for a full investigation to be launched and criminal sanctions issued against guilty parties.

Aryna Sabalenka made a giant career breakthrough by reaching the Australian Open final, revealing: "I've dropped my psychologist and appointed myself."

One year on from being near the lowest ebb of her career, struggling to hit a serve into court, Sabalenka is a changed player after working on the biomechanics of her game.

Three times a losing grand slam semi-finalist, she got over that hurdle for the first time by beating Magda Linette 7-6 (7-1) 6-2 in Thursday's second semi-final, setting up a title showdown with Elena Rybakina on Saturday.

Hard work has brought about this change in Sabalenka, who was stacking up double-figure match totals of double faults as a matter of course in the early stages of last season.

There was work with a psychologist in the background, too, but Sabalenka feels that has run its course, and that nobody understands her better than herself.

It is a gamble, but it also seems to be paying off handsomely.

The 24-year-old fifth seed said: "To be honest, I decided to stop working with a psychologist. I realised that nobody other than me will help, you know?

"In the pre-season I spoke to my psychologist saying, 'Listen, I feel like I have to deal with that by myself', because every time I'm hoping that someone will fix my problem, it's not fixing my problem.

"I just have to take this responsibility and I just have to deal with that. I'm not working with a psychologist any more. I'm my psychologist."

The experiment is working just fine so far, with Sabalenka having a perfect run through her first 10 matches of the year, picking up an Adelaide International title and powering through the grand slam rounds in Melbourne.

She has yet to drop a set this season, and now a first grand slam singles title is tantalisingly close.

Wimbledon champion Rybakina stands in her way, with Sabalenka disclosing she mostly ignored the grass-court slam last year after Russian and Belarusian players were banned from competing.

"I didn't watch Wimbledon last year. I was feeling really bad about that, and I didn't watch Wimbledon at all," the Belarusian said.

"A little bit the final just because I was working out in the gym. I saw a little bit. It was great tennis."

Sabalenka, who is not known for hiding her emotions, appears to be on a sturdy keel in Australia and said she kept the celebrations low-key after beating Linette because "there is one more match to go".

She has won all three of her past matches against Rybakina, but they all came before the Kazakhstani became a major champion.

It is Rybakina who carries the experience of winning in a slam final into Sunday's trophy match, which can be seen as an advantage.

The psychologist lurking within Sabalenka has delivered impressive results so far, and the on-court focus she has demonstrated suggests the woman from Minsk is unlikely to lose any mental battle.

"To be honest, I think I'm not going to do something extra," Sabalenka said. "I think it's okay to feel a little bit nervous. It's a big tournament, a big final. If you're going to start trying to do something about that, it's going to become bigger, you know?

"I'll just leave it like that. It's okay to feel nervous. She's playing great tennis, serving well. I just have to be there and have to work for it and put her under pressure. Yeah, that's it."

Former Denver Broncos head coach Nathaniel Hackett has been hired as the new offensive coordinator for the New York Jets.

The experienced 43-year-old, who previously worked with Jets head coach Robert Saleh at the Jacksonville Jaguars, struggled in his maiden year in Colorado.

That saw him relieved of his duties before the close of the campaign.

Now though, Hackett will head back to New York, where he will reunite with Saleh after the Jets limped to a miserable end in his sophomore season.

The Jets went 5-2 across their first seven games of 2022, but then lost all but one of their final eight to post a 7-10 losing record for the campaign.

Hackett will bring him a storied career that has seen him help lead teams to three Conference Championship games in his role as an offensive coordinator (Jaguars in 2017, Green Bay Packers in 2019 and 2020).

The move also sees him follow in the footsteps of his father Paul, who spent a stint between 2001 and 2004 with the Jets under Herm Edwards.

Under Hackett's watch as OC, the Packers led the NFL in scoring in 2020 with a 31.8 points per game average, while his 2017 Jaguars offense led for rushing yards per game at 141.

His arrival comes alongside the announcement that Keith Carter will also join the Jets as their offensive line coach and run game coordinator.

England scrum-half Ben Youngs believes rugby union's rewards are a counterpoint to the risks and has called for clarity amid revisions to the game's tackling laws.

A backlash has grown through the domestic sport following the Rugby Football Union's decision to limit players to tackles below the waist.

The rule change is set to come into force from July, and will affect the lower tiers of the English rugby pyramid.

Amid calls for an RFU special general meeting from the community game, Youngs has laid out the pros and cons for the change while urging patience.

"Rugby does have its risks, but it also has its huge rewards," Youngs told BBC Sport. "A bit of clarity and help will go a long way, I'm sure.

"I know all the local coaches, everyone at grassroots level, the referees, everyone who gives up their time for the community game, I think clarity for them as well [is needed].

"From the chest down is probably safe enough; that's what I believe."

The 33-year-old, the most-capped England men's international in history with 121 games under his belt, suggested the safety debate should not neuter the principles of the sport.

"I think for rugby union the camaraderie the game gives you, the values, the respect, working together as a team, leadership, being part of something; that all outweighs [the risks]," he added.

"We want safety, but we also want rugby. We don't want that to go."

Youngs will hope to add to his collection of caps when England kick off their Six Nations campaign under his former Leicester Tigers coach Steve Borthwick against Scotland next month.

Hardik Pandya warned India must be at the peak of their powers to secure a T20l series win over New Zealand after a dominant ODI clean sweep.

India head into the first of three T20Is at JSCA International Stadium Complex in Ranchi on Friday on the back of a 3-0 whitewash of the Black Caps in the 50-over format.

New Zealand have won just one of their past 11 completed against India in the short format, with that victory coming in the 2021 T20 World Cup in Dubai.

The tourists are yet to win a multi-game T20I bilateral series in India and they will be without the likes of Kane Williamson, Tim Southee and Tom Latham, with Mitchell Santner taking over as captain.

Pandya will lead India in the absence of Rohit Sharma, while Virat Kohli will not feature and Ruturaj Gaikwad misses out with a wrist injury.

All-rounder Pandya said: "We will try to win obviously. New Zealand is a good team both in T20Is and ODIs.

"They always challenge you. We will have to be at their best to beat them."

Shubman Gill comes into the series in the form of his life, scoring a sublime 208 in the first ODI and a century in the third match.

Gill is set to open the batting with Ishan Kishan, so Prithvi Shaw will have to bide his time.

Pandya said: "Shubman has done well and will start the series. The way he is batting and he was already in the team."

India and New Zealand were beaten semi-finalists in last year's T20 World Cup in Australia, although many of the players involved in the tournament will not be featuring this time around.

Suryakumar on top of the world

Suryakumar Yadav is another player New Zealand will be eager to see the back of before he gets set.

He was named the ICC Men's T20I Player of the Year for 2022 this week and is the top-ranked T20I batter in the world.

Suryakumar made a decisive 112 in his last T20I innings against Sri Lanka, his third century in six months in this format.

Baptism of fire for uncapped New Zealand bowlers

Uncapped duo Ben Lister and Henry Shipley are poised to make their debuts against a formidable batting line-up.

Lister will provide an alternative left-arm seam option with no Trent Boult for Santner to call upon.

Paceman Shipley will also be looking to make his mark on the T20I stage after making his ODI debut against Pakistan and facing India twice.

Mikel Arteta would have been an ideal replacement for Pep Guardiola at Manchester City.

That is according to Guardiola himself, who had Arteta as part of his coaching staff at the Etihad Stadium from 2016 up until Arsenal hired their former midfielder as Unai Emery's replacement just over three years later.

Arteta has needed time at Arsenal, but this year they are not only title contenders, but hold a healthy five-point lead over City at the summit of the Premier League.

Ahead of the FA Cup fourth-round tie the teams, their first meeting in any competition this season, if Arteta could have replaced him at City, Guardiola told reporters: "I'm pretty sure that if I'd have left before, and he would be here, then he would be the best [replacement], absolutely.

"But I accepted [a new] contract, I'm sorry, and he couldn't wait, so it could not happen, but definitely."

Guardiola might think Arteta would have been the perfect fit, but does the data back that up?

Certainly, Arteta's Arsenal have aimed to emulate Guardiola's City in many aspects.

For example, the inverted full-backs that Guardiola has used on and off over his six-and-a-half years in Manchester are now commonplace at Emirates Stadium, too. 

Indeed, in Sunday's 3-2 win over Manchester United, Arsenal left-back Oleksandr Zinchenko – signed, of course, from City – finished with a touchmap resembling an attacking midfielder, not that of a full-back.

But it is certainly not a case of City Mk. II. No, Arteta has built a team on his own merits.

It has taken time, and an element of risk. Arsenal have made 16 errors leading to goals in the Premier League since he took charge in December 2019, as the Gunners have adapted to the Spaniard's preferred style of play.

Yet that is only four more than City. This approach comes with risk, but the rewards are clear to see.

Arsenal have scored 193 top-flight goals under Arteta, with 45 coming this season from just 19 games. They are well on track to smash the high watermark of 61, set last term. In that same time, City have netted 290 times, but it's fair to say they have had better players than Arteta has had to call on.

Defensively, the difference is not as great, with Arsenal conceding 124 to City's 94, though the Gunners boast a better defensive record this season than City.

Indeed, Arteta has overseen steady improvement in the attack. Arsenal's expected goals (xG) went from 52.2 in his first full campaign to 69.6 last season, while the development of Martin Odegaard, Eddie Nketiah, Bukayo Saka and Gabriel Martinelli has demonstrated the 40-year-old's ability to help youngsters thrive.

Given his work with those players, it is hard to imagine Arteta would have failed to get a tune out of Phil Foden or City's other emerging talents.

Defensively, Arsenal were tighter in the 2020-21 season than in 2021-22 (an xGA of 43.3 compared to 51.8), but their 17.2 xGA this season tells the story of a well-drilled defensive unit.

While Arteta values possession, an average of 53.5 over his 116 league games in charge is not quite at the level of City's 66.2 in the same timeframe. 

The similarities are clear, though Arsenal – at least this season – have slightly more dynamism. The fitness of Thomas Partey has been crucial to that, as has the reemergence of Granit Xhaka as an excellent box-to-box midfielder.

The data suggests Arteta could well have taken over from Guardiola in the north west, and perhaps he still might one day.

For now, he will be looking to get one over on his old mentor in the cup, and then complete the job in the league.

Rivals Rory McIlroy and Patrick Reed made positive starts to the Dubai Desert Classic after heavy rain caused play on day one to be delayed by over six hours.

World number one McIlroy was involved in an eve-of-tournament spat with American Reed, who labelled the Northern Irishman an "immature little child" for blanking him at the practice range. Reed was also alleged to have thrown a tee at McIlroy.

McIlroy said Reed's lawyer served him with court papers on Christmas Eve, although Reed has said he was not behind the subpoena, with the case concerned being one brought by American attorney Larry Klayman relating to divisions between LIV Golf and the PGA Tour.

"I'm living in reality. I don't know where he’s living," McIlroy said of his snub for Reed, one of the players who has signed up or LIV Golf. "If I were in his shoes, I wouldn't expect a hello or a handshake."

They could yet end up as playing partners later this week, which would be awkward, and Reed sped out to four under par through 16 holes once play finally got under way on Thursday, before bad light halted players in their tracks.

McIlroy, who began on the back nine, was playing his 16th hole when he abandoned for the day, having reached two under and given himself a great birdie opportunity, leaving himself a five-foot putt for the morning at the par-three seventh.

Playing partner Ryan Fox missed out on a hole in one when his tee shot to the same hole, bang on target, rolled up just six inches short. The New Zealander tapped that in to go to three under.

That put Fox into a share of eighth place, with McIlroy tied for 12th.

Belgium's Thomas Pieters led on five under through 15 holes, one ahead of a group of six, with Reed, Englishman Tommy Fleetwood and Frenchman Victor Perez approaching the end of their rounds, while Matthew Jordan, Daniel Gavins and Oliver Wilson reached the clubhouse. Gavins made bogey after a missed putt at the last, electing to play on after the hooter and forfeiting a share of the lead.

Only 66 players of the 132 in the tournament got going on Thursday, meaning Friday was set to be busy, with those left with holes to complete set to start at 08:00 local time (04:00 GMT), and the rest of the field beginning their first rounds at 08:20, with second rounds to follow.

Padraig Harrington was having a dismal round, with the former Open and US PGA champion at eight over after 13 holes.

After a challenging weather day, leader Pieters said of the course: "I think it played fair. Obviously they guarded against some of the conditions, and they moved a few tees forward on holes like 12, where you normally are hitting long irons, and you're hitting short wedges. If you found fairways and had ball-in-hand, it was definitely playable."

Former New England Patriots offensive coordinator and quarterbacks coach Bill O'Brien has rejoined the team over a decade after his previous stint.

The ex-Houston Texans head coach spent five seasons as part of Bill Belichick's staff between 2007 and 2011.

During that time, he helped the Patriots to a winning record in each campaign, plus two AFC Conference Championship crowns.

Following a dismal 2022 season that saw the Patriots miss out on the playoffs with an 8-9 record, Belichick is delighted to have O'Brien back on-board.

"I am looking forward to working with Bill again," New England's head coach said. "He is an outstanding coach and an asset to our staff."

The return of O'Brien to the Patriots' staff will raise question marks over the future of Joe Judge, who succeeded Josh McDaniels following his move to the Las Vegas Raiders last year.

O'Brien joined the Patriots in 2007 as a coaching assistant, before holding various positions such as wide receivers coach and quarterbacks coach.

The 53-year-old also spent seven seasons in charge of the Texans, earning four AFC South titles during his tenure.

He also spent time with Penn State, and most recently worked as offensive coordinator and quarterbacks coach with Alabama under Nick Saban.