Arsenal boss Unai Emery admits there is frustration after defeat to Chelsea on Saturday.
Emery concedes fighting back to 2-2 and then losing late on was a heavy blow.
He said, "We spoke before the match that we needed to improve and to do one process, to be competitive in each match and to know or learn in the match. At the moment, that can happen. I think today, the team already after 2-0, the reaction was very good.
"In the first half, I think we created more chances to score and I think the 2-2 is a shock for us because we created more chances to score. In the second half, we had less moments in the match and we conceded more chances for Chelsea to score the third goal. For that reason, we need the balance but the result is like that.
"Our process is to just continue to improve the things, doing more with the balance of the defensive moments and attacking moments and also with the younger players with their passing. At the end of the match, we finished with two midfielders who were Lucas at 22 years old and Matteo at 19 years old.
"It's clear, we need to win because we have a big responsibility to win the match and I think for continuing, in the next match in the Emirates against West Ham."