The 20-year-old scored a spectacular winner against Queen of the South at the weekend, following up his winner against Dunfermline from the week before.
The exciting Scotland U21 international, whose father Jose started out as a winger at Benfica, is out of contract in the summer and free to talk to foreign clubs from January.
Doncaster Rovers had a bid rejected last year but they have now been joined by Premier League and Championship sides following his progress.
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