Aguero is the league's joint top-scorer with 19 goals and Sterling has found the net 17 times as City aim to become the first team in a decade to defend the English top-flight title.
Van Dijk has transformed Liverpool's defence since joining the club from Southampton in Jan. 2018, and has been key in the Merseyside club keeping 18 clean sheets this season.
Mane was rewarded for his 18 league goals this campaign, while Hazard has been Chelsea's standout performer with 16 goals and 12 assists.
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Sterling and Silva are also up for the PFA Young Player of the Year award alongside Liverpool full back Trent Alexander-Arnold, West Ham United midfielder Declan Rice, Manchester United forward Marcus Rashford and Bournemouth midfielder David Brooks.
The winners, voted for by the PFA members, will be announced at the annual awards ceremony on April 28.
(Reporting by Hardik Vyas in Bengaluru; editing by Clare Fallon)
