Arsenal manager Arsene Wenger has no idea when injured defender Kolo Toure will return to the Gunners first team.
The dynamic centre-half is facing up to a spell on the sidelines after picking up a calf injury during the Gunners' 3-1 victory over West Brom on Tuesday.
The Ivorian had enjoyed a productive evening at the Hawthorns until he was forced off, notching his first goal of the campaign and laying on the third for Nicklas Bendtner.
However, having struggled through to half-time, he was then replaced by Abou Diaby at the break.
Wenger admits Toure has suffered a setback, but remains unsure as to how long the 27-year-old will be out of action.
"He has a calf problem that we cannot assess at the moment because his pain is moving a little bit," Wenger told the club's official website.
"We will have to assess that when it settles down."