Manchester United have confirmed Facundo Pellistri's sale to Panathinaikos for £5.1m with £1.7m in add-ons to take the total transfer fee to £6.8m.
The deal includes a 45 per cent sell-on clause, while United also have a buy-back option until 2027.
United confirmed the move on their official website on Wednesday evening after negotiating with the Greek club for a number of days over a transfer fee.
Pellistri's final appearance in a United shirt came in the Community Shield against Manchester City at Wembley earlier this month.
The Uruguayan winger played the final half hour as United slipped to defeat on penalties against the reigning Premier League champions.