Celtic defender Boli Bolingoli played in a 1-1 draw at Kilmarnock on Sunday without quarantining after returning from Spain.
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Ryan Christie's goal in first-half stoppage time was enough for Celtic to secure their seventh straight domestic trophy as they beat Aberdeen 1-0 to
Wilson, who has scored four goals in 20 senior appearances for United, has been given no indication he has a first-team future under Jose Mourinho.
Steven Gerrard was denied a win in his first Scottish league game as Rangers manager by an injury-time goal on Sunday.
Jack Cork and Ashley Barnes scored goals in extra time as Burnley beat Aberdeen 3-1 to advance 4-2 on aggregate in the Europa League on Thursday.
Sam Vokes scored a late goal to give Burnley a 1-1 draw at Aberdeen in the Europa League, but the Clarets will be worried by an injury to Nick Pope.
Neale Cooper, one of Aberdeen's European Cup Winners' Cup heroes, has died after being found injured outside his home, the club have confirmed.
Aberdeen clinched second place in the Premiership with a surprise 1-0 win over champions Celtic at Parkhead on the final day of the season.
Celtic secured an eighth consecutive Scottish Premiership title with a convincing 3-0 victory over Aberdeen at Pittodrie Stadium on Saturday.
Celtic moved back nine points clear of Rangers at the top of the Scottish Premiership with a 10th successive win over Aberdeen.