Sporting CP are desperate not to lose Pedro Goncalves this summer.
Record report Manchester United are making tentative contract over the attacker's situation, with Liverpool also keen.
But the Lisbon club want him to lead them in next season's Champions League and a 50 per cent sell-on fee to old side Famalicao makes a deal tough to negotiate.
Pedro is a former Wolves youth teamer and was signed from Famalico primarily to replace United star Bruno Fernandes.
