Robin van Persie was spotted at Carrington on Wednesday ahead of Manchester United's clash against Barcelona the following day.
The Red Devils take on Barcelona at Old Trafford in the second leg of their Europa League play-off. The first leg finished 2-2 and the winners of Thursday's game will be regarded as one of the favourites to win UEFA's secondary men's club competition.
Van Persie visited United's training ground to conduct an interview with manager Erik ten Hag for BT Sport, which suggests he is still a fan of the Manchester club. The Dutchman played for United and Premier League rivals Arsenal during his successful career.