Bayern Munich turn on the power to leave Arsenal with a massive European task
ARSENE Wenger admitted Arsenal "collapsed" as Bayern Munich thrashed them 5-1 at the Allianz Arena.
The Gunners have fallen at this stage in the last six years and now need to produce a miracle performance at the Emirates Stadium to overturn the heavy deficit and progress to the quarter-finals.
Arjen Robben cut inside from the right and curled Bayern ahead in the 11th minute but Alexis Sanchez levelled at the second attempt from the rebound after Manuel Neuer saved his 30th-minute penalty.
Immediately after captain Laurent Koscielny went off injured in the 48th minute, Arsenal conceded three goals in 10 second-half minutes. Robert Lewandowski rose high to head in before sweetly back-flicking to Thiago who found the bottom left corner. Then Thiago's deflected shot from the edge of the box flew in.
After David Ospina, preferred to Petr Cech in Arsenal's goal, made some fine saves, Thomas Muller drilled home from a central position late on to complete the rout.
Wenger told BT Sport 2: "It's difficult to explain. Just before half-time we had two good chances to score. We came back and played well.
"In the second half we lost Koscielny very quickly – he came off at 1-1 – and finally we collapsed. It's difficult mentally, we collapsed – and Bayern are a better team than us as well.
"I felt the third goal was a killer for our players because after that we had no response."
Asked if Arsenal require 'miracles' to progress against Bayern, Wenger replied: "Of course".
Bayern boss Carlo Ancelotti said: "We played really well. The first half, the first 20 minutes, were good but we gave Arsenal the opportunity to balance the game. We had the opportunity to score the second goal.
"We started the second half well and we have a good result for this match but we have to play another match so we have to pay attention because in some situations Arsenal was really dangerous."
Bayern Munich: Neuer, Lahm, Javi Martinez, Hummels, Alaba, Alonso, Thiago, Vidal, Robben (Rafinha 87), Douglas Costa (Kimmich 83), Lewandowski (Muller 86); Subs Not Used: Ulreich, Bernat, Coman, Renato Sanches
Booked: Hummels, Lahm; Goals: Robben 11, Lewandowski 53, Thiago 56, 64, Muller 88
Arsenal: Ospina, Bellerin, Mustafi, Koscielny (Gabriel 48), Gibbs, Coquelin (Giroud 77), Xhaka, Iwobi (Walcott 65), Ozil, Oxlade-Chamberlain, Sanchez; Subs Not Used: Cech, Monreal, Welbeck, Elneny; Booked: Mustafi, Sanchez, Xhaka; Goals: Sanchez 30
Ref: Milorad Mazic (Serbia)