Fiorentina are said to be in negotiations with FC Porto for midfielder Sergio Oliviera.
The Portugal international turns 29 tomorrow and came up through the Porto youth academy.
He scored 20 goals in 48 competitive games this season, along with seven assists.
Most famously, Oliveira found the net twice in the Champions League Round of 16 to eliminate Juventus in Turin.
His contract runs to June 2025 and was only extended in December 2020.
Sky Sport Italia warn this will not be a cheap operation, but Oliviera is requested by new Viola coach Gennaro Gattuso.
Sportitalia maintain the offer is €15m plus bonuses, and the asking price €20m.