Laurent Koscielny concedes Arsenal are suffering a "mental problem".

Speaking with RMC, the French defender was asked about another season collapse for the Gunners.

"We have had bad results. It is a mental problem. We have the technical and physical qualities. We must make effort over a whole match. Against the big teams, it takes more than talent. It takes more commitment, helping your teammate defend," said Koscielny.

"We need to find other resources. In some games, we've lacked things in the duels. We are in a complicated situation, we must remain united. We must find the hatred of losing."