Arsenal boss Arsene Wenger admits he needs to make quality defensive signings in the summer.
"We were leading at Chelsea, we were leading at Liverpool, we were leading at Manchester United, we were leading at home against Liverpool. So we can score goals.
"And up front I feel I need to give time to Nicklas Bendtner and Theo Walcott because they have made big improvements.
"What we could not stop was conceding goals in big games. Nine times out of 10, the team who win the big games is the team who score first. But we lost all these games after being in front every time, so we suffered more as a team defensively than offensively."