Arsene Wenger has confirmed that Jack Wilshere suffered an ankle injury during Arsenal's 0-0 draw against Chelsea on Wednesday.

The injury could keep the 26-year-old out of this weekend's game against Bournemouth.

Wilshere suffered the knock during the second half after blocking a cross and had to be substituted.

"I don't know if he'll be available on Sunday but it's definitely an ankle sprain," Wenger said.

"At the moment we have five big injuries and we're hoping to get some back. The earliest to come back is [Aaron] Ramsey and that is quite welcome because it's an area we're a bit short.

"If we didn't lose Jack tonight then we would have had Ramsey back and then maybe [Mesut] Ozil on Sunday, but we could look a bit short."