Arsenal boss Unai Emery is hopeful a back injury to Laurent Koscienly isn't serious.
The defender was due to start at Bloomfield Road but a back problem in the warm-up forced a late change.
Emery confirmed afterwards, "Yes [it's a back problem]. I hope it's not bad. He has one week to rest and to work, thinking about the next match against West Ham. I hope he's going to be OK for the next matches but before the match, he felt some pain in his back.
"We decided it was better for him to not play. At the moment, with our problems at centre back, it meant we were able to look at different players in different positions. Today that was Lichtsteiner, who played with very good commitment and concentration to help us at centre back with Sokratis."
