Manchester United will have to stump up £37million if they want to land William Carvalho this summer.
The Portuguese midfielder has been linked with a move to Old Trafford, while Chelsea are also said to be interested.
But its has been reported on the Metro website, Red Devils boss Louis van Gaal will have to hand over £37m to Sporting Lisbon
“It’s not like the old days when players left Sporting at any price,” said director Augusto Ignacio.
“We are not concerned with William Carvalho because we have alternatives, who will want to play as well.
“The termination clause ensures a great deal to Sporting. I am very pleased with the negotiations.
“It is not easy to negotiate for players, you need to be very shrewd but Sporting have a president who knows how to negotiate with anyone and what is best for the club.”