Arsenal boss Mikel Arteta was "very disappointed" after their draw at West Ham.
Arsenal blew a 2-0 lead - and missed a penalty - as they drew 2-2 at London stadium.
A close-range finish from Gabriel Jesus and Martin Odegaard's volley had the visitors 2-0 inside the opening 10 minutes. But West Ham fought back first via a Said Benrahma penalty, won by Lucas Paqueta, and then Jarrod Bowen's equaliser.
Between West Ham's goals, Bukayo Saka missed from the spot following Michail Antonio's handball.
Afterwards, Arteta said: "Very disappointing. The way we started was superb again, we were in total control, then we lost purpose.
"We gave them hope, conceded a terrible penalty, then credit to them. We got on the roller coaster where everything is going, corners and throw ins, and we never got away from that.
"The purpose we needed for third and fourth goal, I didn't see it."
On Saka, he added: "A player who takes penalties misses penalties, I don't know anyone who hasn't."
