LONDON - Arsene Wenger has said his Arsenal side are in the middle of an injury crisis ahead of their Champions League group game with Galatasaray and the Premier League clash with Chelsea that follows soon after.

On Saturday, the Frenchman saw the Gunners come back from a goal scored against the run of play by Nacer Chadli to share a 1-1 draw at home with Tottenham Hotspur in the north London derby, with Alex Oxlade-Chamberlain firing in Arsenal's equaliser.

But that point came at a cost as both Mikel Arteta and Aaron Ramsey were forced off before half time with injuries and will play no part in either of the next two fixtures.

That has limited Arsenal manager Wenger's choices in midfield, especially as Jack Wilshere was also hurt in the derby, suffering an ankle injury.

The England international was substituted just after the hour mark and is a doubt for the Galatasaray game at the Emirates Stadium on Wednesday.

"There is no chance," Wenger said when asked about Arteta and Ramsey's prospects of being involved in Sunday's trip to Chelsea. "If it is a muscular problem, I don't see how they can be fit in five or six days time," he added.

"I don't know how long they'll be out but they will be out until next week.

"Suddenly we are short because we lost three players and let's not forgot that we already have two out long-term [Olivier Giroud and Mathieu Debuchy] plus [Theo] Walcott. [Abou] Diaby is not ready so it starts to become a worry."

Ramsey and Wilshere have both been troubled by injuries in the past but Wenger insisted he was at a loss to explain the latest setbacks.

Tottenham manager Mauricio Pochettino was keen to heap praise on his players in his first north London derby.

"Arsenal managed the ball and the territory and possession but we were compact in our defensive line and we were able to get the ball forward quickly to surprise Arsenal.

"Today we competed on the pitch."