Predicting all 4 grand slam tennis men's singles champions this season! Who you think it will be?

I am going to start: AO - Djokovic RG - Nadal WC - Djokovic USO - Zverev Your thoughts?
Answers

Bob

AO= Djokovic,Fench= Nadal,Wimbledon= Federer,USO= Djokovic

JonZ

AO =Federer. French = Dominic Thiem, Wimbledon = Djokovic, Us Open = Djokovic