He added: “I am far from relaxed. We deserved to lose which is fair enough because we were simply not good enough. We were simply not competitive.
“The worrying part is that the level of commitment physically and mentally for this match was far higher for Arsenal than for us. They played I think what is their strongest line-up and structure that you see now for several weeks. This was the line-up they will try to start for Premier League games.
“It was surely not our strongest line-up. This is a part of an explanation but only a little part and the other part is worrying.”
“I cannot guarantee we will be ready in two weeks.”