Zverev’s frustrations yet again reignite the debate that ATP should consider using the same balls throughout the calendar year.

Defending champion Alexander Zverev advanced at the Italian Open on Sunday by beating Lithuanian qualifier Vilius Gaubas in straight sets. No. 2-ranked Zverev won 6-4, 6-0 in the third-round match in Rome and will play France's Arthur Fils next.

But he turned up at the Foro Italico nine hours before his third-round match and was immediately questioned by Alexander Zverev, who wanted to know why Alcaraz had arrived so early. And the Spaniard had a hilarious explanation, showing where his priorities lay.