Arsene Wenger to analyse Gunners injury crisis
Arsenal will review their medical and training methods after Mesut Ozil became the latest key player to be sidelined by a muscular injury.
German playmaker Ozil is expected to be sidelined for around a month, possibly even six weeks, with a grade two hamstring tear.
He was substituted at half-time of Tuesday night's 1-1 draw against Bayern Munich in Germany.
He joins Aaron Ramsey in the treatment room, with the Wales midfielder having seen his own comeback from a thigh injury ahead of Sunday's north London derby at Tottenham now put on hold.
"I am concerned that happens," Wenger said.
"If you look at our overall injury list going into such a final decisive part of the season, we have no (Jack) Wilshere, (Theo) Walcott, Ozil, Ramsey. We went to Bayern with no (Kieran) Gibbs or (Nacho) Monreal. Of course it is a concern," Wenger said.
"For some, like Walcott (knee injury), it is bad luck, the rest maybe we have to find out why.
"We are analysing very deeply why it happened to see if there is a link between these injuries."
Wenger is confident the loss of Ozil will not prevent Arsenal getting their title challenge back on course at bitter rivals Tottenham tomorrow.
"It is a blow of course, but I am confident we have the quality to deal without him during that period," said Wenger, whose side could be 10 points behind leaders Chelsea before they kick off at White Hart Lane with the Blues playing Aston Villa today.
"We have many creative players within our squad who can take over and produce quality performances themselves. I am convinced that the team is ready, even without Ozil, to go for the challenge."