India, May 28 -- Alexander Zverev found himself in trouble just before his French Open clash against Tomas Machac on Wednesday. Former star John McEnroe publicly challenged the German's recent comments comparing himself to Novak Djokovic and Carlos Alcaraz.

McEnroe's comments came as Zverev went against Machac. The 67-year-old questioned whether the world No. 3 belonged in the same conversation as two of the sport's biggest names.

The controversy began following Zverev's loss to world No. 1 Jannik Sinner in the Madrid Open final earlier this month.

While discussing the current hierarchy in men's tennis, Zverev argued that Sinner was above the rest of the field, while also placing himself alongside Djokovic and Alcaraz in the next tier....