Arsenal boss Mikel Arteta says talks are still ongoing with the authorities over Kieran Tierney and his potential availability to play against Manchester City.
The Scotland full-back was ordered to self-isolate for 14 days after being in close contact with his international teammate Stuart Armstrong, who tested positive for coronavirus.
Armstrong and Tierney, as well as Celtic's Ryan Christie - another who was deemed to be in close contact, missed Scotland's three matches during the international break against Israel, Slovakia and the Czech Republic.
Armstrong's 10-day period of isolation will come to an end on Friday, making him eligible for the Saints' trip to Chelsea on Saturday.
But Tierney is set to miss the City clash, and the defender released a statement after the announcement was made, stating his disappointment as he had adhered to all the social distancing guidelines.
"I'm so disappointed and frustrated to be in this situation. I have adhered to all regulations and made sure I was socially distancing from my team mates in the hotel. I've also tested negative.
"I know Arsenal and the SFA are now in discussions with the Scottish authorities to gain a further understanding."
As it stands, Tierney would not be able to play against Manchester City on Saturday, but Arteta says discussions are ongoing to determine whether a compromise can be made.
"This is getting very complicated when we send players abroad and lose control" Arteta said in his press conference.
"Some authorities have different regulations to the ones in the Premier League.
"We are still having some discussions and hopefully we will have more news this afternoon.
"I cannot discuss individual medical things."
When asked if Tierney could play, Arteta added: "I hope so."
