Arsenal boss Mikel Arteta has explained Kieran Tierney's absence for victory over West Ham.
The Scotland international was pulled from the starting XI following the pre-match warm-up, to be replaced by Sead Kolasinac for Saturday's 2-1 win.
Arteta said, "Kieran is fine. He had a little muscular discomfort in the last few days. He tried today and worked in the warm-up but he wasn't feeling comfortable today.
"Well, we could not control it. We believed that he was going to be fit but during the warm-up, in the last 10 minutes, he said he wasn't feeling OK. We had to make a decision. We were prepared just in case and Kola came on and had a good game."
