Olivier Giroud, whose hat trick powered Arsenal past Olympiakos and into the UEFA Champions League round of 16, received praised from Gunners manager Arsene Wenger, who believes theFrenchman should rank with top strikers in the world. “I think he’s in that league because he plays for one of the best clubs in Europe and he scores goals,” Wenger said. The Arsenal manager also saidhe had no reason to sign embattled Karim Benzema. “We just said that Olivier Giroud is a great striker, so behind that we cannot buy Karim Benzema,” he said.