Manchester City got their revenge on Barcelona as Ilkay Gundogan scored twice in a 3-1 win in the Champions League on Tuesday, while Arsenal were one of four sides to secure progress to the last 16. Pep Guardiola's side had lost 4-0 away in Barcelona two weeks ago but they showed tremendous character to come from a goal down and beat the Spanish champions 3-1 at the Etihad Stadium.
The inevitable Lionel Messi put the visitors in front at the end of a stunning breakaway with his 90th Champions League goal.
However, City pounced on a Sergi Roberto mistake as Raheem Sterling set up Gundogan to equalise six minutes before half-time.
A Kevin De Bruyne free-kick gave City the lead six minutes into the second half and, although Andre Gomes rattled the bar for the visitors, the Premier League side were on top and they secured the victory thanks to Germany midfielder Gundogan's second of the night.
In Germany, Celtic kept their hopes of at least snatching third place and a Europa League spot alive as they came from behind to draw 1-1 with Gladbach at Borussia-Park.
Mesut Ozil scored a stunning winner as Arsenal fought back from two goals down to beat Ludogorets 3-2 in Sofia and secure their place in the last 16 for the 17th season in succession.
Jonathan Cafu put the Bulgarian champions ahead and then set up Claudiu Keseru to make it 2-0 to Ludogorets inside quarter of an hour.
Bayern came from behind to beat PSV Eindhoven 2-1 at the Philips Stadion after Santiago Arias put the Dutch champions in front early on.