Tottenham face stiff competition should Porto make Joao Moutinho available.
Incoming Spurs boss Andre Villas-Boas is keen on Moutinho should he lose Luka Modric this summer.
The Daily Star says Spurs could face a fight for his services with champions Manchester City, Manchester United, Chelsea and Liverpool all interested.
Villas-Boas, though, has a close connection with Moutinho, who was a key figure in his Porto team when they won the title, domestic cup and Europa League in 2010-11.