He said after the game:
"We had a good first half and created many chances to get to half-time at 3-0. But it was difficult to keep the focus a bit. Norwich came out with a desire to be more aggressive and play more direct, while we came out with a little bit less focus and the two created the chances for Norwich.
"At 3-1 we had five or 10 minutes where we were a little bit on the ropes. 3-2 would certainly have provoked a huge support from the fans, but in the final 20 minutes I though that we were in control of the game and knew we would create another chance.
"It is a target for us to come out in the second half and keep exactly the same determination. We could not do that today, whether it was because we relaxed too much mentally or relaxed physically, I don't know."
He added: "We played on Sunday and again on Wednesday and had to dig deep twice to win our games in the second half. I knew the second half would be difficult because Norwich do not give up."