How Novak Djokovic, Rafael Nadal and Roger Federer performed in their first events as world number one

Alexander Zverev became the 30th official world number one on Monday.

Zverev snatched the top spot from Jannik Sinner after defeating Tallon Griekspoor in the Vienna Open round of 16 last week.

Zverev is now set to compete in the Paris Masters – his ... [2805 chars]

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