Arsenal have confirmed that manager Mikel Arteta has tested positive for coronavirus on Thursday.
"Our London Colney training centre has been closed after head coach Mikel Arteta received a positive COVID-19 result this evening," an Arsenal club statement read.
"Arsenal personnel who had recent close contact with Mikel will now self-isolate in line with Government health guidelines. We expect this to be a significant number of people from Colney, including the full first-team squad and coaching staff, as well as a smaller number of people from our Hale End Academy which we have also temporarily closed as a precaution.