Diomande, who is 21 years old, had been linked to several other top clubs in the past, including Chelsea and Manchester United. However, it now seems that he could be joining FA Cup holders Crystal Palace instead.

According to sources, negotiations between Sporting CP and Crystal Palace are currently underway to discuss Diomande's future. The team's manager, Oliver Glasner, is said to be a big fan of the centre back, especially given the likelihood that Marc Guehi may leave the team this summer.

Guehi has been heavily linked with a return to Chelsea, as his current contract with Crystal Palace is set to expire at the end of next season.