Arsenal boss Mikel Arteta has revealed the extent of damage done on full-back Kieran Tierney.
The Scot was withdrawn during West Ham United clash on Saturday night and replaced by Sead Kolasinac after feeling an issue in the warm-up.
Gunners fans were understandably worried about the ex-Celtic defender, given the injury issues that plagued Tierney’s first season with the club.
But Arteta has insisted that the 23-year-old is “fine”.
He 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.
“We believed that he was going to be fit but during the warm-up, in the last ten 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.”