Olivier Giroud has now scored more Champions League goals for Arsenal than Dennis Bergkamp

The Frenchman opened the scoring with a header against Olympiakos

Olivier Giroud celebrates opening the scoring Arsenal (Getty Images)

It's official, Olivier Giroud has now scored more Champions League goals for Arsenal than Gunners great Dennis Bergkamp.

His goal put the Gunners 1-0 up at Olympiakos, but they still require at least one more goal to progress to the Last-16.

Speaking before kick-off, Arsenal manager Arsene Wenger said he believed his side could be "dangerous" in the latter rounds of the Champions League - so long as they get there.

"Of course we can be dangerous if we go through because we come from far back," he said.

"Overall if you look at the numbers since the start of the Champions League group stage, we have played with 10 men in Zagreb, we scored an own goal at home to Olympiakos.

"Every single game we were a bit unlucky but if we get through we will be dangerous that is for sure.

"At the moment we have two or three super-favourites and whoever gets through tonight or tomorrow will have to chase them.