Cape Town - Arsenal have been dealt another injury blow after second choice goalkeeper David Ospina's recurring thigh injury has flared up again, forcing him to be sidelined for up to three months.The Gunners face Anderlecht in the Champions League tonight and, with Ospina now injured and Wojciech Szczesny suspended, manager Arsene Wenger has no choice but to call up third choice keeper Emiliano Martinez.According to the Mirror, Colombian keeper Ospina arrived at the Emirates during the Summer with a thigh problem and Wenger expects his current injury to be a result of the initial problem."It is exactly the same (injury) . He had his first injury in Nice, it was a knee problem and I think he was a bit rushed back," Wenger said."He didn't use his legs so his muscle became weaker, then he got injured during the World Cup. And after that he came to us injured, from the World Cup. It took him two months to play a game."I had to bring him on against Galatasaray without warm-up, without being prepared and he had a recurrence of that injury. That means he is out for two to three months."Now we have to be really careful because he has a recurrence of a thigh injury that's very difficult. It's a long-term injury."