Krzysztof Piatek touched down at Fiorentina to face questions about in-demand striker Dusan Vlahovic, as the club distanced themselves from links to Real Madrid midfielder Isco.

PIatek, who has joined on loan from Hertha Berlin for the rest of the season with an option to buy, returns to Serie A after previous spells at Genoa and Milan.

The 26-year-old has a solid track record in the Italian top flight, and his arrival has inevitably added to speculation that Vlahovic may not be with Fiorentina for much longer.

Vlahovic's record of 35 goals in 46 games in 2021 has drawn the attention of many of Europe's elite teams, and he has also been linked to Newcastle United.

It has been reported in Italy that Fiorentina consider Piatek as a player to strengthen their squad, rather than as a replacement for 21-year-old Vlahovic.

Polish frontman Piatek is relishing the chance to play alongside the young Serbian when the chance arises, saying on Saturday: "Vlahovic is an excellent striker, he has scored many goals.

"I think I also showed my worth with Genoa and Milan. I think we can also play together when necessary. In any case, I'm at the coach's disposal, even starting from the bench."

Fiorentina sit sixth in Serie A heading into Sunday's trip to Torino, with coach Vincenzo Italiano hoping Piatek can rediscover the form that saw him score 30 goals in the 2018-19 season.

He began that campaign at Genoa before heading to Milan in mid-season, typically marking his goals with finger pistol celebrations.

"I'm ready to be a gunslinger. I want to show that my guns are ready to shoot at the Franchi. I'm really very happy to be here."

Fiorentina have also signed forward Jonathan Ikone from Lille for a reported €15million fee this month, so they would be well stocked if Vlahovic did move on.

There seems little prospect of Isco joining the Viola ranks, however, with sporting director Daniele Prade distancing the club from reports linking them to the 29-year-old.

Isco has been at Madrid since 2013, making over 300 appearances for Los Blancos, but he has become a fringe member of Carlo Ancelotti's squad, leading to rumours of a move.

Prade told a news conference: "In recent days there have been many rumours about Isco, but we don't even know the agents, so we are not interested, even though we recognise his value."

Napoli have confirmed the loan signing of Manchester United defender Axel Tuanzebe for the rest of the season.

Tuanzebe made 11 appearances during a loan spell with Aston Villa this season, but was recently recalled by the Red Devils.

The 24-year-old central defender is on the move again after agreeing to join Serie A side Napoli.

Tuanzebe had spent two previous loan spells at Villa Park in 2018 and 2019, when the club was in the Championship, and has made 37 appearances for United.

Tuanzebe could be available to make his debut for Luciano Spalletti's side against Sampdoria on Sunday, with the club struggling depleted due to injuries, COVID-19 cases, and Africa Cup of Nations call-ups.

Third-placed Napoli have the joint-best defensive record in Serie A this season, conceding just 15 goals in 20 games, from just 16.36 expected goals against, the lowest tally in the Italian top-flight.

They have, however, struggled in the absence of influential defender Kalidou Koulibaly, who missed a month through injury before jetting off to play in the Africa Cup of Nations.

Spalletti's team have kept just one clean sheet since Koulibaly's last appearance, a 2-2 draw with Sassuolo in early December, and will now hope that Tuanzebe, who has represented England at three youth levels, can provide valuable cover in the heart of their backline. 

Arsenal utility man Ainsley Maitland-Niles has joined Serie A side Roma on loan until the end of the season.

The 24-year-old will link up with fellow England internationals Chris Smalling and Tammy Abraham under Jose Mourinho at the Stadio Olimpico.

Maitland-Niles has made eight appearances for Arsenal this season but has not featured since coming off the bench in the 4-0 defeat at Liverpool in November.

Mourinho has reportedly been seeking reinforcements at full-back, with Italy international Leonardo Spinazzola missing since suffering an Achilles injury at Euro 2020.

Maitland-Niles, who can play at full-back or in midfield, spent the second half of last season on loan at West Brom, where he made 15 appearances for the ultimately relegated Baggies.

The player appeared to try and force a move away from the Gunners in August when he took to Instagram to say: "All I want to do is go where I'm wanted and where I'm going to play."

However, a reported move to Everton failed to materialise and Maitland-Niles eventually agreed to stay at the north London club until January.

Milan head coach Stefano Pioli has compared Rafael Leao to a young Thierry Henry following his impressive 26-minute cameo against Roma, insisting the sky is the limit for the forward.

After a month on the sidelines with a thigh injury, the Portugal international returned as a substitute during Milan’s 3-1 win at San Siro.

The 22-year-old wasted no time in making a telling impact; demonstrating tremendous pace to break away from the visiting defence and score the third goal to wrap up the points.

Leao also earned a penalty for the hosts in the dying moments following another blistering run, although Zlatan Ibrahimovic failed to convert from the spot.

The former Lille forward has now netted five goals in Serie A this season, with only Ibrahimovic (seven) doing so more often for the Rossoneri.

He has also attempted 69 dribbles in the Italian top-flight this term; a tally only bettered by Nicolo Zaniolo (78) and Felipe Anderson (77).

His style of play has drawn comparisons from his coach with former Juventus forward Henry, who won the World Cup, European Championship, Champions League and a further five domestic titles during a glittering career. 

"Leao reminds me so much of Henry at the beginning of his career, when he started from the left," Pioli said.

"He has the talent to get to the top of the world, but talent alone is not enough.

"He's getting close to 100 per cent, he still can't be [fully fit] and will need minutes. 

"He has to work with a lot of ambition; he can get to be a really strong player on the European and world scene."

Massimiliano Allegri says he will need "a year or two" to make Juventus Serie A title contenders ahead of Sunday's crunch clash at Roma.

Juve boss Allegri won five consecutive league titles during his previous spell at the club, but took on a rebuilding job when he returned to Turin last May.

The Bianconeri are fifth in the table ahead of their trip to the Eternal City, 11 points adrift of leaders Inter and the champions have a game in hand.

Allegri reiterated that he will need time to make Juve a huge force once again.

"I came here knowing that this year we needed to start changing the team, [in order to] be back challenging for the title in a year or two," Allegri said.

"We could have done better so far, but it's a matter of experience, it's normal to pay for our mistakes.

"In football, things don't miraculously change in a short time."

Juve are three points ahead of Roma and Allegri is expecting a huge battle with Jose Mourinho's side.

"Tomorrow will be an important match," he continued. "Roma have excellent individuals and a coach capable of preparing them in the best possible way. Competitiveness and technique will be key.

"Against Napoli we expected to win and get within two points of them, coming from a positive period, but we still kept the gap unchanged. We need to improve the quality of our passes, but we are growing. January will be important.

"We are working to improve our game. We want to reach our Champions League goal, and then there are still many other ambitions.

"To win, you need to have quality as well as technique, and it is only with experience that you learn that."

Allegri will be absent from the touchline for the encounter with Roma, after being handed a one-match ban and a €10,000 fine by the Italian Football Federation following a furious outburst at referee Simone Sozza at the end of the 1-1 draw with Napoli on Thursday. 

Juve have the opportunity to win three consecutive league games against the Giallorossi for the first time since 2014.

Lazio head coach Maurizio Sarri is keen to avoid a return to Serie A matches being played behind closed doors, insisting it cannot only be football that is locked down amid rising COVID-19 cases in Italy.

Like much of Europe, Italy is now in the midst of another wave of coronavirus infections.

Games in some regions of Germany have been played behind closed doors since late last year, while Scotland has also introduced similar measures to limit social interaction.

So far, matches in Europe's other major leagues apart from the Bundesliga have been able to be played in front of crowds.

Italy's spike in confirmed COVID-19 cases has reached unprecedented levels in the country, with 219,430 new cases confirmed on Friday, surpassing records set on both Wednesday and Thursday, according to the World Health Organisation (WHO).

Italian prime minister Mario Draghi has reportedly expressed his concerns to Italian Football Federation (FIGC) president Gabriele Gravina, with the government worried about a lack of adhering to safety and social distancing measures within stadiums.

According to widespread reports in Italy, Serie A chiefs will be meeting this weekend to discuss their options, with Corriere dello Sport reporting that the issue will then be discussed in Wednesday's meeting between the FIGC and the government.

Sarri, however, believes it would be unfair to play matches behind closed doors once again, suggesting that if the situation in the country is so serious, then the entire nation must be once again placed into lockdown, not just football.

"COVID affects everyone's life, not just sport. If this pandemic is dangerous there should be a total lockdown, otherwise it will be downgraded to a flu and people will stay at home with a fever," he told a news conference ahead of Sunday's meeting with Inter, who had their game against Bologna postponed at the last minute on Thursday due to a decision by local health authorities.

"I just hope that we don't end up with a closed stadium – it makes people who are as passionate as I am lose the desire to go on the pitch."

Sarri's side are eighth in Serie A following Thursday's 3-3 draw with his former club Empoli. 

Lazio's meeting with Inter represents the second time they have gone up against their ex-coach Simone Inzaghi this season, with Sarri's team having come out on top 3-1 in October.

Jurgen Klopp is feeling fine after recently contracting coronavirus and could return to the dugout for Liverpool's FA Cup third-round tie against Shrewsbury Town on Sunday.

The Reds boss missed the 2-2 Premier League draw with Chelsea last weekend after testing positive for COVID-19.

Liverpool assistant Pep Lijnders also tested positive on Wednesday amid an "escalating number" of suspected COVID-19 cases that forced the club to shut their training centre.

The Reds' EFL Cup semi-final with Arsenal on Thursday was subsequently postponed, but this weekend's clash with third-tier Shrewsbury will go ahead.

And one of Klopp's other right-hand men, Peter Krawietz, is hopeful the 54-year-old will be able to take charge of the match at Anfield.

"We hope he will be involved," Krawietz said. "He is fine. He has to do tests, but we hope he will be fine for tomorrow."

Alisson, Roberto Firmino and Joel Matip missed the draw with Chelsea after testing positive for coronavirus.

Krawietz was unwilling to divulge how many players Liverpool are without for the Shrewsbury tie, but admitted it has been tough to prepare for the game given the circumstances.

"I can't tell you exact numbers but obviously the situation is like that for the game tomorrow," he said. "We have a squad, we have a team and will try to win this game.

"It's a difficult situation out there. We had a couple of injuries, illness, COVID cases. This is the situation we have to deal with.

"We're still waiting on a few results with players who are not here today. They have to do their test before they can join the building. This is why I cannot give exact numbers.

"The training ground being shut means nobody could come here. We tried to stay in contact with our players during this period, just like we did in lockdown. 

"Everyone is on their own and, thanks to our great working department, we were able to find solutions for the players."

However, Krawietz did go on to confirm that centre-back Matip is now back in training after returning a negative test and may feature against Shrewsbury, fitness depending.

Liverpool have progressed from nine of their last 10 FA Cup third-round ties, losing the other 2-1 against Wolves in 2018-19.

The Reds have only lost two home games in the competition against sides outside the top-two tiers since joining the Football League in 1893 – Norwich City in 1908-09 and Bolton Wanderers in 1992-93.

But Krawietz, who will be the third different person to manage Liverpool in their last three games if Klopp and Lijnders are absent, is taking nothing for granted.

"Shrewsbury will tough because of their quality," he said. "They're a team who play proper football, want to attack, have strong strikers and a compact defensive formation. 

"They are a team that is well-managed, you can see that. They will have targets, and our situation is not ideal."

Rafael Nadal fended off a battling Emil Ruusuvuori to reach the Melbourne Summer Set final as the Spanish veteran bids to land the 89th singles title of his stellar career.

Nadal, who has won at least one ATP Tour tournament in every season from 2004 onwards, will look to extend that streak into a 19th year after scoring a 6-4 7-5 win on Rod Laver Arena.

He has not captured a title in Australia since 2009, when he landed his only Australian Open triumph to date by beating Roger Federer.

Nadal will be a strong favourite against American qualifier Maxime Cressy in Sunday's final, despite being made to work hard to see out victory over 22-year-old Ruusuvuori.

The 35-year-old Mallorcan looked set for a routine win but dropped serve at 5-3 in the second set, allowing world number 95 Ruusuvuori a path back into the contest.

It provided Nadal with a test of resolve that he came through, tying up victory in an hour and 56 minutes, an encouraging sign as he continues to battle for full sharpness after a near five-month absence.

Nadal acknowledges he may not have long left in tennis, and he wants to make the most of the opportunities that remain.

"I just love what I'm doing," he said in an on-court interview. "I always feel passionate about the sport in general and I feel a very lucky person that I can live from one of my hobbies, tennis.

"I know it's not forever and it's not a job I'm going to do for 50 years, but I want to enjoy it as much as I can while I still have the chance."

The foot injury that caused the 20-time grand slam winner to curtail his 2021 season in August has not prevented him finding winning form this week and now Paris-born Cressy awaits, with the 24-year-old world number 112 enjoying a remarkable week.

Cressy was a 7-5 7-6 (11-9) winner on Saturday against Bulgarian third seed Grigor Dimitrov, serving 17 aces on the way through to his first ATP Tour final.

At the Adelaide International 1 event, Gael Monfils will face Karen Khachanov for the trophy.

Top seed Monfils ended the spirited run of Australian wildcard Thanasi Kokkinakis, earning a 7-5 6-0 semi-final win, while second seed Khachanov battled past former US Open champion Marin Cilic 7-6 (7-3) 6-3.

Paris Saint-Germain will be without Lionel Messi for Sunday's Ligue 1 trip to Lyon.

Messi tested positive for COVID-19 while back home in Argentina and subsequently missed PSG’s 4-0 victory over Vannes in the Coupe de France on Monday.

However, the seven-time Ballon d'Or winner returned a negative test on Wednesday and was set to be available to face Lyon.

Yet Ligue 1 leaders confirmed on Saturday that the 34-year-old will "continue his post-COVID individual recovery protocol for the next few days."

PSG also revealed that Angel Di Maria, Julian Draxler, Danilo Pereira, Layvin Kurzawa and Gianluigi Donnarumma remain in isolation after recently returning positive tests.

Meanwhile, Neymar is resuming his rehabilitation and is scheduled to return to training in three weeks' time.

Head coach Mauricio Pochettino acknowledges that PSG must adapt in the absence of players, but insists that every team is in the same boat.

During his pre-match press conference, he said: "All teams have absent players; so do we. We have to adapt to everyday life. Sometimes, we have to change our plans.

"It's the same every game, we always have to make choices. We have to put the players in the best conditions."

On the prospect of facing Peter Bosz's Lyon side, he added: "They are one of the best teams in France. 

"There is a very great coach. In the end, they will be fighting for the first places.

"It will be difficult, but we are optimistic."

Paul Pogba is still "four or five weeks" away from returning to training with Manchester United, interim manager Ralf Rangnick has revealed.

The 28-year-old midfielder has not featured for United since their 2-2 Champions League draw with Atalanta on November 2, having sustained a calf injury on France duty shortly afterwards.

Rangnick previously indicated Pogba could make a comeback early in the new year, but that timescale has now been revised.

"As far as I know, I was told a week ago, it would be a minimum of at least another four or five weeks before he is fit for training again," Rangnick told United's official website.

"I saw him this morning before the training session. He was in the locker room, and I hope he will be back as soon as possible."

Prior to sustaining his injury, Pogba led the way in the Premier League for assists with seven from nine appearances, averaging exactly one assist per 90 minutes on the pitch.

Despite him missing United's last 11 matches, only Bruno Fernandes (eight) has assisted more goals than Pogba for the Red Devils in all competitions this season.

Among players in Europe's top five leagues to have played as many times as Pogba this term, only RB Leipzig's Brian Brobbey has assisted more goals per 90 minutes (1.45).

Pogba is yet to appear under Rangnick, who was appointed as Ole Gunnar Solskjaer's temporary successor in late November, but the German will not rush the midfielder's return.

"Right now, he's not been part of the training group and, even if he was back whenever, two, three or four weeks, it will take some time," Rangnick said.

"It's one thing to be training fit, but he needs to be fit for the match and competition in either the Premier League or the Champions League and this will still take some time."

Pogba is into the final six months of his United contract and has been strongly tipped for a free transfer away from Old Trafford at the end of the campaign.

According to reports in the British press on Friday, United have offered Pogba a new deal worth £500,000 a week.

Speaking last month, Rangnick insisted it is not his job to persuade Pogba – or any other United player – to stay at the club.

The Red Devils are back in action on Monday with an FA Cup third-round game against Aston Villa at Old Trafford.

Ash Barty moved a step closer to a second Adelaide International title in three seasons as she crushed defending champion Iga Swiatek's hopes in the semi-finals.

Competing as a stepping stone towards her principal goal of challenging for the Australian Open title later in the month, home favourite Barty sped to a 6-2 6-4 win over the 2020 French Open winner.

She served fewer aces than Swiatek – five to the seven fired down by the 20-year-old Pole – but Barty's powerful forehand proved decisive as she made snappy work of ending the contest.

Barty will face Elena Rybakina in Sunday's final, after the Kazakh beat Japan's Misaki Doi 6-4 6-3. Queenslander Barty beat Dayana Yastremska in the 2020 final.

Having won the French Open and Wimbledon already in her career, Barty will be the favourite at the Australian Open, which begins on January 17 in Melbourne.

The world number one, by seeing off ninth-ranked Swiatek, boosted her win-loss record against top-10 WTA rivals to 8-1 since the beginning of last year.

Barty said, quoted on the WTA website: "It is exciting to be able to play well here in Australia. This is where I want to play my best tennis. I want to give myself an opportunity to play for titles in Australia.

"It's something really exciting to start the year off as an Aussie player in front of our home fans."

Reflecting on a positive performance, Barty, who has also reached the doubles final with Storm Sanders, said: "I felt like on Iga's service games I was able to get into most of them, which is important when you're playing someone who can dominate with that first ball and first strike.

"I felt like I was able to build pressure over time, making her play a lot of balls on her service games, not giving her too many cheapies."

Swiatek is entered into next week's Sydney Classic and learned on Saturday that she faces a testing opener there, having been drawn to face Great Britain's US Open champion Emma Raducanu in a standout first-round match.

At the Melbourne Summer Set 2 tournament, Russian third seed Daria Kasatkina suffered a shock 6-2 6-0 semi-final defeat at the hands of American world number 78 Amanda Anisimova.

Anisimova goes on to face fellow unseeded player Aliaksandra Sasnovich for the title, after the Belarusian beat American Ann Li 7-6 (7-4) 2-6 6-3.

Most of the games in the additional week added to the NFL season have little meaning.

However, the much-publicised 'biggest season ever' will end in dream fashion for the league, with the Las Vegas Raiders hosting what essentially amounts to a play-in game in their shiny new stadium against a Los Angeles Chargers team trying to become big business in one of the largest media markets.

It is winner-take-all, with the victor securing a place in the Wild Card round and the loser left to wonder what might have been.

And, given the teams involved, it is certain to attract monster ratings as the primetime finale to the regular season.

That begs a little-discussed question. Should the NFL, having already extended the regular season and the postseason, follow the NBA's lead and make play-in games a permanent fixture of the calendar by instituting a play-in tournament?

NBA tournament met with criticism

The NBA implemented play-in games for the 2019-20 season and expanded to a play-in tournament, contested by seeds 7-10 in each conference, for 2020-21.

It received sharp criticism from LeBron James, who said: "Whoever came up with that s*** needs to be fired."

Yet James produced the most compelling argument for the play-in tournament remaining in place as his Los Angeles Lakers met the Golden State Warriors in the 7-8 matchup and he hit the decisive three-pointer over Stephen Curry in a 103-100 thriller.

Such high-profile names delivering such high-stakes drama will have only vindicated those in the league office who backed the play-in tournament, and surely somebody among the NFL's powers that be will have paid attention.

Marquee matchups

The NFL does not need star names to be on show for people to watch. As the United States' number one sports league, primetime NFL games typically attract huge television audiences regardless of who is playing.

There is little doubt a play-in tournament would be a success in that sense, and in it would provide some hugely attractive matchups this season.

With seven teams from each conference qualifying for the playoffs, an equivalent tournament in the NFL would need to involve the sixth, seventh, eighth and ninth seeds.

Were the season to end today, that would mean a bracket with the Indianapolis Colts, Chargers, Raiders and Pittsburgh Steelers in the AFC. In the NFC, the San Francisco 49ers, Philadelphia Eagles, New Orleans Saints and Minnesota Vikings would contest the tournament.

In other words, it would put eight franchises steeped in history into winner-take-all games in front of massive international audiences.

Additionally, it would prevent awkward tiebreaking scenarios such as the one that could come to pass in the NFC, where the Niners will miss out if they, the Eagles and Saints all finish 9-8 because of an inferior conference record, this despite them beating the Eagles in Week 2 of the regular season.

Yet a play-in tournament would likely meet stern opposition for several reasons.

Safety concerns

The decisions to expand the playoff field to 14 and then extend the regular season by an extra game were not exactly wildly popular, and it's unlikely the NFL Players Association would be thrilled about eight teams potentially having to play two more games just to get into the playoffs.

Those teams would be at a competitive disadvantage to the rest of the field that would have the benefit of a bye week, though the counter-argument would be that winning your division - and therefore avoiding the tournament - would be more meaningful.

And beyond concerns about player safety, asking teams to possibly risk losing a playoff place to a team they outperformed in the regular season is likely to be an extremely tough sell.

The NFL is not exactly struggling for eyeballs, so at this point adding a play-in tournament would be viewed by many as needless following the recent expansion of the schedule, with the negatives in terms of player safety and potential competitive disadvantages in the early rounds of the playoffs outweighing the benefits in revenue and eliminating tiebreakers.

But, with the 17th regular-season game perceived by some as a stepping stone to an 18th, there is no guarantee the NFL is done with schedule expansion. And, nothing, not even what would certainly be a controversial play-in tournament, can be ruled out.