The world number one defeated Stefanos Tsitsipas in straight sets.
Pedro Ros Sogorb
The Serbian continues his uptick after a strong showing in Madrid
Djokovic and Federer advanced on Tuesday while Rafael Nadal is on court today
Reilly Opelka and Felix Auger-Alliassime are among first time entrants who advanced in the first round.
The top players in the ATP and WTA converge on Madrid as Roland Garros lies ahead.
The top Polish player is now on the radar as one to watch in the coming months.