It was reported yesterday that midfielder Cazorla will be out for three months, but manager Arsene Wenger could today give no time-scale on when Cazorla and Sanchez could return.
"At the moment on Alexis, Santi and Mikel [Arteta], we don't know how long they will be out for," Wenger said.
In total, the Gunners have 10 players out injured, in a long list that also includes Jack Wilshere and Danny Welbeck.
So, how will the Arsenal injuries affect Wenger's team selection, click through the gallery below:
Arsenal's injury list - what does it mean?
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The threadbare Gunners are next in action on Saturday, in the Premier League against Sunderland at the Emirates Stadium.
Wenger said that there is a chance Walcott and Koscielny could return for the match against the Black Cats.
"We will make a decision on Saturday on Koscielny and Walcott, they could both make the squad," the manager said.
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