Bruno Fernandes may have ended his Sporting Lisbon career with defeat after the Portuguese side suffered a 2-1 friendly loss to Valencia.
Bas Dost had given the hosts the perfect start with a goal after five minutes, only for Geoffrey Kondogbia to level shortly after.
Valencia striker Rodrigo then missed a penalty beofre providing the assist for Kevin Gameiro's winner in the second half.
Sporting Lisbon captain Fernandes appears to be closing on a £62million move to Manchester United, meaning the friendly at José Alvalade Stadium could have been his last game.
He had previously starred in his side's 2-2 friendly draw with Liverpool, scoring and assisting in an impressive display.
The midfielder scored 32 goals and set up a further 18 last season to draw the attention of the Old Trafford side.