Sporting Lisbon defender Marcos Rojo has fuelled speculation linking him with a move to Manchester United after he followed a handful of United players on Instagram.
Rojo also started following United's official account, plus those of Wayne Rooney, Robin van Persie and Adnan Januzaj on Friday night.
Rojo was the subject of a failed bid from Southampton last week.
The Argentine left-back scored four goals in 24 league appearances for Sporting last season.