AC Milan midfielder Alen Halilovic wants to cut short his loan with Standard Liege.
Halfway through a two-season arrangement, the Croatian wants to leave Belgium before the market shuts.
La Dernière Heure says Vitória Guimarães have expressed interest in Halilovic.
Now 23, the midfielder has struggled since being signed as a teenager by Barcelona.
He has spent time with Sporting Gijón, Hamburg SV and UD Las Palmas in recent seasons.