Jose Mourinho was among those in attendance as Belgium took on Iceland in the UEFA Nations League, sparking reports that Manchester United may still be keen on Toby Alderweireld.
With domestic football having shut down during the international break, the man in charge at United has taken the decision to head out of Old Trafford, seemingly on a scouting mission.
His first port of call was Brussels, with the Portuguese heading to the King Baudouin Stadium on Thursday evening.
Mourinho was not there to watch two of his own players, however, with Belgian duo Romelu Lukaku and Marouane Fellaini both unavailable for selection.