Tierney a doubt against Man City due to coronavirus

The full-back Tierney has already played three matches at the start of the season before the international break. He is now self-isolating at home though.
After the tests carried out, Stuart Armstrong tested positive so Tierney had to leave the Scotland camp as he had been in close contact with him.
The defender will have to have several PCR tests before he can return to training with Arsenal and he must come back negative twice.
Tierney got coronavirus a couple of months back so he will have antibodies against it. The Man City fixture is next Saturday and he is a doubt for the match.