UNITED KEEP TABS ON PORTUGUESE WHIZKID
He is already rated in the £12million bracket by his club, even though he is still only 18.
The Manchester United boss sent chief scout Mick Brown to watch Quaresma in Saturday's 1-0 home defeat against Porto.
It was their latest trip to see one of Europe's leading young talents - and one of the most significant given the opening of the transfer window.
A deal with their Portuguese 'twin' club is more likely at the end of the season, however, as they monitor his progress.