Chelsea rode their luck to emerge with a second win in as many English Premier League games on Wednesday after Branislav Ivanovic escaped a red card and then his marker to head them to a 2-1 win over Aston Villa.
Images from the UEFA Champions League matches played on Wednesday
News of all that's transpired on and off the football field
Bayern Munich and Barcelona registered easy wins, while Manchester United came from behind to beat CSKA Moscow 2-1 and Chelsea surrendered the top spot after a 1-1 at home against Atletico Madrid.
Atletico Madrid got their La Liga campaign up and running in less than convincing fashion when Antoine Griezmann's deflected free kick secured an edgy 1-0 win at home to promoted Las Palmas on Saturday.
Lionel Messi marked his first start after injury with a goal in Barcelona's 1-1 draw at AC Milan in the Champions League on Tuesday while Fernando Torres got two as Chelsea thumped Schalke and Atletico Madrid's charge continued.
A summary of Wednesday's matches in the UEFA Champions League.
Barcelona battled back from a goal down and scored twice in the second half to overcome hosts Borussia Moenchengladbach 2-1 in their Champions League Group C match on Wednesday despite the absence of the injured Lionel Messi.
Making their first appearance in the WTA Finals in Singapore, Sania Mirza and Cara Black outplayed Raquel Kops-Jones and Abigail Spears in their opening match to book their semi-finals berth on Thursday.
Croatian wunderkind Borna Coric offered emphatic proof of his potential when he crushed Rafael Nadal in the Swiss Indoor tournament on Friday before local hero Roger Federer cruised into the last four.
Photos from the Champions League matches played across Europe on Tuesday