Arsenal manager Arsene Wenger hit out at Romanian referee Ovidiu Alin Hategan for sending off striker Olivier Giroud after the Gunners slumped to a 2-1 defeat in their Champions League Group F opener at Dinamo Zagreb.
The France forward missed a couple of early chances before collecting two cautions in the first half, for dissent and then tripping Daniel Ivo Pinto.

Dinamo went on to record their first Champions League win since September 1999, having taken the lead against the run of play with an own goal from Alex Oxlade-Chamberlain when the ball bounced back off him past goalkeeper David Ospina, who had saved Josip Pivaric's shot.

Wenger, however, accepted Arsenal were well below the required performance, while adding the corner that led to the second goal for Zagreb was not defended well.
"When you don't win the game you have to look at yourself and think you haven't got it right," Wenger said. "I don't believe the players who came in had a bad game but it didn't work, it didn't work.
"I have to analyse that well. It is very difficult to give a definite answer straight after the game.''
Arsenal next host Olympiakos before a double-header with group favourites Bayern Munich.
Wenger said: "Mathematically, we can qualify without any problem if we produce our performances that we want at home.
"Overall, I believe we have problems to start in every competition this season. We had problems in the Premier League and again in the Champions League tonight, but I am confident we can put that right in the next five games.''
Dinamo Zagreb manager Zoran Mamic had warned his side had no intentions of giving Arsenal an easy ride at the Maksimir Stadium.
Mamic praised the way Dinamo, who have never qualified for the knockout stages, went about their business.
He said: "I am very happy and proud. I thank the team for doing what I told them and the fans for pushing us when Arsenal had us under pressure.
"Now they have such confidence because see how good they really are.
"After this we are ready for anything which might come, but are also aware of the strength of the group and cannot fall into euphoria.''