Champions League rivals Tottenham and Ajax are also doing battle in the transfer market.

Record says the two clubs are eyeing Porto defender Diogo Queiros.

The youngster has just helped Porto win the UEFA Youth League, beating Chelsea in the final last weekend.

Queiros has a deal to 2021 and a buyout clause of €45m, however Porto would be willing to sell this summer for a much lower price.

Both Spurs and Ajax have intimated a willingness to put €15m on the table - which could be enough for Porto.

Ajax see Queiros as a replacement for captain Matthijs de Ligt, while Tottenham face the prospect of losing Toby Alderweireld this summer.