City blew the chance to move into fourth place in the table as Everton won 2-0 at Eastlands on Wednesday night.
"I am frustrated for the players, as for me they play a good game," the City boss said.
"It can happen sometimes, you cannot score a goal sometimes it is impossible and this night it was impossible.
"It was a difficult game because Everton is a good squad, but we didnt deserve to lose this game.
"I am frustrated for the supporters, for the players, but this is football.
"I think we are a good team and if we believe in ourselves we can get the fourth place."