Alexander Zverev's alarming slump in form continued as he was beaten by Tallon Griekspoor in his opening match at the Indian Wells Masters.
Carlos Alcaraz is edging closer to reclaiming the No 2 spot in the ATP Rankings after a dominant performance against Tallon Griekspoor at the China Open.
Alexander Zverev came through a five-set marathon to reach the fourth round of the French Open.
Novak Djokovic battled into the semi-finals of the Geneva Open with victory over Tallon Griekspoor.
Australian Open champion Jannik Sinner recovered from a set down to beat Tallon Griekspoor, while Daniil Medvedev and Casper Ruud also advanced at the Miami Open.