Barcelona clinched a 1-0 away win at Atletico Madrid, while AS Roma held AC Milan to a 2-2 draw.
Erling Haaland set another scoring record as Manchester City beat Bayern Munich
Images from the UEFA Champions League group matches played on Wednesday night.
Man United were mistakenly drawn with Villarreal, even though both teams had already faced each other in the group stage.
Holders Real Madrid breezed past Chelsea into the semi-finals of the Champions League with Rodrygo's double securing a 2-0 win at Stamford Bridge.
IMAGES from the soccer matches played across European leagues over the weekend.
Lionel Messi scored his maiden goal for Paris St Germain in Tuesday's 2-0 Champions League victory against Manchester City.
A round-up of Wednesday's action in the UEFA Champions League.
If two or more clubs are level on points at the end of the group stage, a number of criteria will be taken into consideration to decide the qualifiers for the next round, starting with the head-to-head record among the teams in question. It then goes to superior goal difference and then goals scored in those matches.
The nose of the statue was cut off in a pre-Christmas attack but the vandalism this weekend was the most severe yet.
Seven-time European champions AC Milan hit back from two goals down against Celtic to claim a 4-2 victory that sent them into the Europa League knockout phase on Thursday as they were among 14 teams to progress in Europe's second-tier competition.
A summary of the concluding day's action in the Bundesliga, Serie A, Ligue 1 and Saudi Pro League.
Bayern Munich and Atletico Madrid made it four away wins from the opening four Champions League last-16 first leg matches when they triumphed at Arsenal and AC Milan respectively on Wednesday.
Previously, several clubs, including Sampdoria and Torino, had opposed carrying on while Brescia went further, saying they would prefer to forfeit matches rather than take to the field.
Inter Milan will have their hardcore 'ultra' supporters present for Sunday's Milan derby after the Italian Football Federation's (FIGC) Court of Justice suspended a partial stadium closure while it carries out further investigations.
AC Milan survived a grilling at Arsenal to reach the Champions League quarter-finals 4-3 on aggregate despite losing the second leg of their last 16 tie 3-0.
Spain's big two face a pair of Italian giants in the Champions League this week, boasting 22 European Cups between them, as AC Milan aim to end a recent bad record against Barcelona and Juventus seek to peg back Real Madrid.
FIFA President Sepp Blatter was 'appalled' by racist jeering directed at AC Milan's Mario Balotelli during their Serie A match against AS Roma, he said on Monday.
Ibrahimovic and Lukaku, who played together at Manchester United, exchanged words at the end of the first half before the pair had to be restrained as the players left the pitch for the interval.
The start of the transformation of Gareth Bale from a gangly teenager who did not play on the winning side in his first 24 Premier League matches for Tottenham Hotspur to the world's most expensive player can be pin-pointed to an exact place and time.
Juventus moved top with 19 points to Inter's 18 and it was a deserved victory in an absorbing contest.
Lionel Messi has rarely been accused of failing to deliver in big games, having scored in two European Cup finals, but after subdued performances against AC Milan and Real Madrid, questions are being asked.
Inter Milan coach Andrea Stramaccioni is still holding out hope that Wesley Sneijder will play for the club again but a move to the English Premier League looks the most obvious choice for the talented Dutch playmaker.
A summary of Friday's action in the UEFA Nations League.
Barcelona extended their LaLiga lead to eight points thanks to second-half goals by Jordi Alba, Gavi and Raphinha that gave them a 3-0 home win against Sevilla
There were renewed calls for action against racism in Italian football on Friday after Inter Milan fans were accused of abusing Tottenham Hotspur striker Emmanuel Adebayor in a Europa League last 16 clash in the San Siro.
It was hard not to feel sorry for AC Milan coach Massimiliano Allegri and his players after they were on the wrong end of a Barcelona backlash in the Champions League on Tuesday.
Barcelona pulled off a remarkable Champions League comeback when Lionel Messi scored twice in a thrilling 4-0 victory at home to AC Milan on Tuesday that sent the Spanish club through to the last eight 4-2 on aggregate.
Lionel Messi has often said personal accolades are secondary to the fortunes of the team and Barcelona's Argentina forward would probably swap all four of his World Player of the Year awards for a comeback success against AC Milan on Tuesday.
In separate statements, the clubs announced that the matches would take place at each of their stadiums and would raise money for boosting healthcare resources in Italy and Spain, but not in Germany.
A touch of romance has returned to the Champions League quarter-finals with seven countries, including Cyprus, represented in this week's first legs with AC Milan-Barcelona topping the bill.
AC Milan dismissed manager Filippo Inzaghi on Tuesday after a disappointing season in which the side finished 10th in Serie A and failed to qualify for Europe.
A summary of football matches played across Europe over the weekend.
AC Milan were booed off the pitch after suffering a shock 1-0 home defeat by Atalanta in Serie A on Saturday following a second-half Luca Cigarini strike that stunned the San Siro.
AC Milan survived an almighty scare against a rejuvenated Arsenal to scrape into the UEFA Champions League quarter-finals 4-3 on aggregate on Tuesday despite being thrashed 3-0 by the London side.
Barcelona need to avoid over-exuberance if they are to overturn a 2-0 deficit in Tuesday's Champions League clash at home to AC Milan, midfielder Cesc Fabregas said on Thursday.
Giampaolo Pazzini's double helped AC Milan take third place in Serie A with a 3-0 home victory over 10-man Lazio at the San Siro on Saturday.
Barcelona and Lionel Messi can write new chapters in the record books on Tuesday if they are able to break out of the straightjacket imposed on them by AC Milan and reach the Champions League semi-finals.
Gennaro Gattuso faces the prospect of disciplinary action for his headbutt on Tottenham Hotspur assistant coach Joe Jordan after UEFA said on Wednesday it was opening a case against the AC Milan captain.
Zlatan Ibrahimovic curled home a stunning freekick and then turned provider as AC Milan moved to within one point of Juventus at the top of Serie A with a 3-0 home win over Cagliari on Sunday.