Lautaro Martinez scored twice as Inter went top of Serie A with a commanding 4-0 win over Cagliari at San Siro.

Martinez, who also had a penalty saved, opened the scoring with a first-half header and Alexis Sanchez doubled the lead shortly after the restart.

Hakan Calhanoglu’s thumping 25-yard strike increased the advantage, before Martinez put the icing on the cake by taking his Serie A tally for the season to 10 with a neat finish.

Simone Inzaghi's side moved a point clear of city rivals Milan at the summit of the table after an eighth win in 10 league meetings with the Rossoblu.

No team have scored more goals from set-pieces than Inter in Serie A this season.

So it was no surprise that the hosts netted another to open the scoring against the side that had conceded the most in the Italian top flight, with Martinez powerfully heading in from Calhanoglu’s corner just before the half-hour mark.

Martinez had a great chance to add a second just before the break after Denzel Dumfries was brought down by Alessio Cragno in the box, but the goalkeeper redeemed himself by guessing correctly to keep out the spot-kick.

Inter doubled their lead within five minutes of the restart as Sanchez neatly guided home Nicolo Barella's cross on the volley.

Calhanoglu got in on the act 66 minutes in as he beat Cragno with a stunning long-range strike.

Martinez was on target again two minutes later; latching onto Barella's lofted through ball before slotting in his sixth league goal against Cagliari in seven appearances.

Sanchez rattled the bar late on as the defending champions made an emphatic statement as they rose to the summit.

Kylian Mbappe became the youngest player in Ligue 1 history to score 100 goals for a single team with his second of the game for Paris Saint-Germain against Monaco on Sunday.

The France international opened the scoring from the penalty spot after 12 minutes against his former club at the Parc des Princes following Djibril Sidibe's foul on Angel Di Maria.

Youssouf Fofana's wayward pass then allowed Lionel Messi the chance to attack on the stroke of half-time, the Argentina international offloading to Mbappe, who curled into the bottom-right corner to reach the 100-goal milestone.

Aged just 22 years and 357 days, Mbappe is the youngest player to achieve the feat for one club in French top-flight history since Opta began recording data back in 1950-51.

Mbappe has nine goals and 14 assists to his name in Ligue 1 this season for Mauricio Pochettino's side, who hold a substantial lead at the top of the table.

Messi's assist for Mbappe's landmark goal also means the former Barcelona star has been involved in goals in consecutive games for the first time in his PSG career, having netted a brace against Club Brugge in the Champions League in midweek.

Mercedes have lodged an intention to appeal against the stewards' decision to reject their protests over Max Verstappen's dramatic title-clinching Abu Dhabi Grand Prix victory.

Verstappen claimed his maiden Formula One world title in the most dramatic fashion at the Yas Marina Circuit on Sunday after overtaking Lewis Hamilton on the final lap of a decisive last race of the season.

Hamilton was on the brink of being crowned champion for a record eighth time when he built a healthy lead until the safety car was deployed with four laps to go after Nicholas Latifi crashed.

Verstappen pitted to have fresh tyres fitted and had his last chance to win the race – and the championship – when race director Michael Masi ruled lapped cars in between the top two could overtake the safety car, which headed in and allowed one final lap of racing.

The Dutchman passed a stunned Hamilton, with Masi explaining to furious Mercedes team boss Toto Wolff: "We went car racing."

Mercedes launched a formal protest "against the classification established at the end of the competition" as Red Bull basked in the glory of their sensational triumph.

The Silver Arrows complained that Verstappen may have briefly edged in front of Hamilton, who had position as the lead car, behind the safety car and also protested over how rules were applied concerning when lapped cars can overtake under safety-car conditions.

While race stewards accepted Verstappen had "for a very short period of time" moved slightly ahead of Hamilton, they were satisfied that he dropped back behind the leader before the safety car period ended.

The second part of the appeal was also rejected by the stewards, but Mercedes will take the matter further.

A team statement said: "We have lodged notice of intention to appeal the decision of the stewards under Article 15 of the Sporting Code and Article 10 of the Judicial and Disciplinary Rule."

The stewards had declared that "once the message 'safety car in this lap' has been displayed, it is mandatory to withdraw the safety car at the end of that lap" and "notwithstanding Mercedes' request that the stewards remediate the matter by amending the classification to reflect the positions at the end of the penultimate lap, this is a step that the stewards believe is effectively shortening the race retrospectively, and hence not appropriate".

"Accordingly, the protest is dismissed," the stewards added.

Kevin Durant has been fined $25,000 for aiming obscene language at a fan during the Brooklyn Nets' 113-105 victory over the Atlanta Hawks.

Durant powered in 31 points against the Hawks on Friday but has been punished for an apparent verbal spray towards a member of the crowd during the second quarter.

The NBA's president of league operations Byron Spruell announced the fine on Sunday in a statement that said: "Brooklyn Nets forward Kevin Durant has been fined $25,000 for directing obscene language toward a fan.

"The incident took place with 28 seconds remaining in the second quarter of the Nets' 113-105 win over the Atlanta Hawks on December 10 at State Farm Arena."

It is not the first time that Durant has been in trouble with the NBA this season either, given the 33-year-old was fined the same amount at the end of October.

The forward's previous misdemeanour occurred against the Indiana Pacers, when he was reprimanded for "forcefully throwing the game ball into the spectator stands" during the third quarter of the Nets' win.

Fortunately for Brooklyn, Durant will not be suspended for any matches and the Nets will be delighted to keep their star in action, given he is averaging 28.5 points per game across 24 outings in the 2021-22 campaign.

Brooklyn, who hold a slender lead over the Milwaukee Bucks for the best record in the Eastern Conference, were due in action later on Sunday in a game against the Detroit Pistons.

Gerard Pique claimed the future will be bright for Barcelona given the club's emerging youngsters but labelled the current situation as "critical".

Barcelona were held to a 2-2 draw at Osasuna on Sunday, with Chimy Avila's deflected late strike salvaging a point for Jagoba Arrasate's side to leave Xavi's new team without a win in three games across all competitions.

The result meant the Blaugrana sat 15 points behind LaLiga leaders Real Madrid, even before Los Blancos' clash with city rivals Atletico Madrid later on Sunday.

However, it is not all bad news, given Ez Abde and Nico Gonzalez scored their first goals for the club, the first time in the 21st century that Barcelona have had two teenage goalscorers in a top-flight game.

Pique pinpointed the academy players as a key reason for hope in the future, but the centre-back appreciates the present is just as important for the struggling Catalan club.

"A new era begins in which we have to start adding three [points] at a time in the league," Pique told Movistar Plus.

"It is the priority, we have to try not to increase the distance with those above. This result is a very great pity.

"The objective is to think about the next game, only in the short term. We know that in the long run, these young people are going to be very good for the club.

"We have to get results, win and win again. It is really urgent, we are in a critical situation."

Barcelona were knocked out of the Champions League in midweek following defeat at Bayern Munich, but they looked like responding well against Osasuna, who have not defeated the Blaugrana in a home league game since February 2012.

But the defensive frailties of the Barcelona defence were evident once more when David Garcia headed home and then again when Avila struck from the edge of the area with four minutes remaining.

Indeed, Barca – alongside five other teams – have kept a league-low three clean sheets this term, but Pique feels confident results will come if his side keep putting in the hard work.

"I think that little by little we are going to give more," he said. "The team today have competed. Obviously, we can play better. But in attitude and work, nothing can be said to us. The games and results will come.

"It is a matter of time, but we don't have it. It is urgent to start winning. Now every game is a final."

Mercedes have had their first protest against the result of the Abu Dhabi Grand Prix dismissed by race stewards.

Max Verstappen won the race and the championship in dramatic circumstances on Sunday, passing Lewis Hamilton on the final lap after the safety car had been deployed.

Having entered the race all square with Verstappen at the top of the standings, it seemed as though Hamilton would clinch a record eighth driver's title when he built up a healthy lead in the closing stages.

However, Hamilton's advantage was wiped out by the deployment of a safety car that was sent onto the track after Nicholas Latifi crashed with four laps remaining.

Verstappen pitted to get fresh tyres for a potential shot at passing the Mercedes man, and he got that chance when race director Michael Masi belatedly ruled lapped cars could overtake the safety car, which headed in and allowed one lap of racing between the contenders.

Verstappen beat Hamilton as Mercedes fumed, with Masi explaining to Mercedes team boss Toto Wolff: "We went car racing."

As Red Bull celebrated their sensational victory, Mercedes protested "against the classification established at the end of the competition".

Mercedes' protest alleged Verstappen had overtaken Hamilton before the safety car pitted and opposed the decision to allow the selection of lapped cars to pass.

While race stewards accepted Verstappen had "for a very short period of time" moved slightly ahead of Hamilton, they were satisfied that he dropped back behind the leader before the safety car period ended.

Red Bull had argued that Hamilton had never been overtaken, rather that both cars were "on and off the throttle" and that there were "a million precedents" where cars had moved alongside an opponent while under a safety car before dropping back.

No decision had yet been announced by the FIA – the sport's governing body – with regards to Mercedes' second protest.

Joshua Kimmich expressed regret at not jumping at the chance to be vaccinated against COVID-19 – but took a swipe at those who criticised his hesitancy.

The Bayern Munich and Germany midfielder has confirmed he is now ready to take a vaccine after months of delaying his decision, and after experiencing unpleasant effects of having the virus himself.

The 26-year-old caused a major stir in October when he explained he was not willing to receive his first dose due to what he perceived as a lack of research into possible long-term effects.

"Generally, it was just difficult for me to deal with my fears and concerns, which is why I was undecided for so long," Kimmich said, speaking to German broadcaster ZDF.

"Maybe I had to go through what I have now gone through first. Of course, looking back, I would like to make the vaccination decision earlier, but at the time it wasn't possible for me."

Kimmich has not featured for Bayern since November 6 after twice being forced to isolate due to being a close contact of someone who tested positive for coronavirus.

He was then infected with COVID-19 and was this week ruled out until 2022 due to an issue with his lungs. He told ZDF that to return to full training now would create the risk of that problem extending to his heart and "longer consequences".

Kimmich has been dismayed by some reaction to his reluctance to be jabbed, saying: "I have to say personally that some of the limits have been exceeded.

"I also had the feeling that there was one or another who tried to make a name for themselves through this situation. It wasn't always just objective criticism.

"We always talk about respect, tolerance, openness – and these are precisely the values ​​that I particularly missed in my discussion."

Kimmich has played 18 times for Bayern across all competitions this campaign.

Bayern, who are playing their home games behind closed doors due to coronavirus restrictions imposed in Bavaria, sit six points clear at the top of the Bundesliga after beating Mainz 2-1 on Saturday.

Chimy Avila's late strike salvaged a 2-2 draw for Osasuna after teenagers Ez Abde and Nico Gonzalez scored their first Barcelona goals in an entertaining LaLiga clash.

Barca crashed out of the Champions League with a 3-0 defeat at Bayern Munich on Wednesday, but they looked set to respond with a battling victory at Estadio El Sadar.

Nico put Xavi's side in front on Sunday, only for David Garcia to equalise a couple of minutes later.

Ez Abde appeared to have won it with a strike early in the second half, but Avila struck in the 86th minute to rescue the home side.

The finale to the 2021 Formula One world championship was fitting entertainment at the end of an extraordinary season.

On the final lap of the Abu Dhabi Grand Prix, Max Verstappen overtook Lewis Hamilton and crossed the line in first place to become world champion for the first time.

Hamilton had looked on course for a record eighth driver's title until the safety car came onto the track after Nicholas Latifi crashed with four laps remaining.

It led to a thrilling but controversial finish – but should it have been done differently?

What happened?

Latifi hit the barriers on lap 54 and the safety car was deployed while the track was cleared.

Given Hamilton had been approximately 12 seconds clear in the lead at the time, Red Bull opted to pit Verstappen for fresh tyres in case a late dash for the chequered flag became a possibility. Hamilton stayed out, his team having warned that bringing him in for a tyre change would have given up track position to his title rival.

Discussions were then held between the respective team principals and race director Michael Masi over how the race would be concluded.

Red Bull's Christian Horner asked why cars that had already been lapped were not being allowed to pass the safety car once it was safe, which would have cleared the track between Verstappen and Hamilton and allowed for a last-lap race for the line.

Race Control, having initially declared that lapped cars would not be released, then gave the order for the five drivers keeping Verstappen from the back of Hamilton to pass the safety car.

This meant that, once the safety car left the track, racing could resume for one final lap – giving Verstappen, on far fresher tyres, the opportunity he needed to pass Hamilton and win the race, thereby clinching the title by just eight points.

Shortly after the race, Mercedes lodged an appeal against the result, citing alleged breaches of Article 48.8 and Article 48.12 of the rulebook: the first relates to overtaking under the safety car, while the second concerns the process of releasing lapped cars.

Why was it controversial?

The Formula One regulations for 2021 state: "If the clerk of the course considers it safe to do so, and the message 'LAPPED CARS MAY NOW OVERTAKE' has been sent to all competitors via the official messaging system, any cars that have been lapped by the leader will be required to pass the cars on the lead lap and the safety car.

"This will only apply to cars that were lapped at the time they crossed the line at the end of the lap during which they crossed the first safety car line for the second time after the safety car was deployed. Having overtaken the cars on the lead lap and the safety car these cars should then proceed around the track at an appropriate speed, without overtaking, and make every effort to take up position at the back of the line of cars behind the safety car. 

"Whilst they are overtaking, and in order to ensure this may be carried out safely, the cars on the lead lap must always stay on the racing line unless deviating from it is unavoidable. Unless the clerk of the course considers the presence of the safety car is still necessary, once the last lapped car has passed the leader the safety car will return to the pits at the end of the following lap."

The rules do not specify whether the race director may allow only some of the lapped cars to pass, and not all. This is why Michael Masi's decision to release only the cars between Verstappen and Hamilton, allowing for a final lap of racing between the title contenders, has caused such a debate.

What has been said?

Horner told Sky Sports: "We felt hard done by with the stewards at the beginning of the race, but they did great to get the race going again.

"We were screaming at him [Michael Masi]: 'Let them race'. That's what we've been talking about all year and this championship came down to the last lap. A great strategy call to make that pit stop, to take that set of softs, and then it was down to Max to make it happen.

"It's unheard of to leave the cars unlapped. You could see they wanted to get the race going again, and they don't need to catch up the back of the paddock. They made absolutely the right call - difficult circumstances, and they called it right."

George Russell, who will join Mercedes for the 2022 season, said on Twitter: "THIS IS UNACCEPTABLE! Max is an absolutely fantastic driver who has had an incredible season and I have nothing but huge respect for him, but what just happened is absolutely unacceptable. I cannot believe what we've just seen."

Lando Norris, the McLaren driver who was one of those allowed to pass the safety car, said: "I'm not too sure what was said from the FIA. At first, we weren't allowed to overtake, as the backmarkers, so if that influenced decisions to Mercedes and to Lewis and that's the reason they didn't do their pit-stop...

"But then the FIA suddenly changed their minds and they were allowed to let us past. That's where I'm not so sure. For it to end like that, I'm not so sure."

Damon Hill, the world champion in 1996, said on Sky Sports: "This is like running a motor race in a way we've not been used to in the past. They've kept us guessing all the time as to which way a decision is going to go. One team who is not going to be complaining about what happened is Red Bull."

Nico Rosberg, who won the 2016 title, said: "First they said you're not allowed to unlap themselves, then they changed that message once they saw it was safe to do so.

"The thing is that in the document it says 'all cars will be required to unlap themselves' and yet they only let those five cars that were between Lewis and Verstappen unlap themselves. That's where Mercedes are asking if it's okay or not. But I guess in the end Michael Masi can decide what he wants, he's the race director."

Jenson Button, the 2009 champion, said: "It definitely went Max's way only letting those five cars past but earlier in the race it sort of went Lewis' way. Michael Masi wants to get them racing, he doesn't want to decide the world championship."