Arsene Wenger has confirmed that Jack Wilshere, Theo Walcott and keeper Wojiech Szczesny are out of their Champions League meeting with Borussia Dortmund tomorrow.

Wilshere is to see a specialist to assess the extent of his latest ankle injury.

The midfielder picked up the knock in Saturday's defeat to Manchester United, and Wenger is unsure when he will return.

"I cannot give you any time schedule. He has to see a specialist next week to see for how long he will be out. We don't know for how long at the moment," said Wenger.