Manchester United's Nemanja Matic has retired from international duty, meaning – among other things – that he will have to quarantine on his return from Serbia.
The veteran's decision means he is no longer covered by the 'elite sportsperson' protocol and, due to UK government travel restrictions, he will have to self-isolate for two weeks once he is back in the UK.
Before retiring, Matic would have been covered by the 'elite sportsperson' protocol which means that any top-level sportsperson could travel and not need to quarantine when returning home.
Now that Matic's stay in Serbia was only a holiday, he will have to self-isolate for two weeks when he lands back in the UK.
It is thought that the Serbian's quarantine shouldn't affect Manchester United's pre-season preparation, as Matic would have been on international duty for the same amount of time he will be self-isolating for anyway.
The 32 year-old announced his international retirement on Friday, citing the progress of younger players as his primary reason for quitting.
The Serbian FA's sporting director Vladimir Matijasevic said: "We respect his decision. He is 32 years old and he's had an exerting club season. European club football is demanding and hence we are aware that we'll have to inject fresh blood into the national team."
Matic played in the majority of Manchester United's games in the final spring of last season, including the 2-0 win over Leicester on the final day to secure Champions League qualification. He was used sparingly in their Europa League run though, that participation ending at the semi-final stage with a 2-1 loss to eventual winners Sevilla.
The Serbian will be slowly integrated back into the squad for United. Their first game of the season, against Burnley, has been postponed due to their Europa League run, so Matic may be back and ready to go for the game against Crystal Palace a week later.