The 26-year-old was a key performer for Fortuna Sittard in this year’s Eredivisie, with seven goals and six assists.
Diemers is out of contract in June 2021 and has been close to joining FC Groningen.
However, Feyenoord have made a ‘last minute’ move for Diemers and held talks with the player’s agent over a multi-year deal.
Diemers now has a big choice to make: Groningen or Rotterdam.
Feyenoord’s interest is nothing new, as they have been scouting Diemers for a while. Head coach Dick Advocaat is a big fan of the productive midfielder.
The former Utrecht and De Graafschap man could become Feyenoord’s first signing for next season.
The Rotterdam club previously failed to sign Bryan Linssen on a free transfer from Vitesse.
Feyenoord are also doing everything they can to extend the contracts of Leroy Fer and Eric Botteghin.