Two days after Jannik Sinner’s shocking meltdown at the French Open it’s still unclear what exactly the issue was that led to him wasting a seemingly insurmountable advantage in his second-round match.

Top-ranked Jannik Sinner appears to be struggling with the heat during his second-round match at the French Open against 56th-ranked Argentine opponent Juan Manuel Cerundolo.

Jannik Sinner may have felt lucky to survive the Australian Open third round but he has rebounded quickly in a straight-sets win over fellow Italian Luciano Darderi to reach the quarterfinals for a ninth consecutive Grand Slam event.

Jannik Sinner made a dramatic comeback at the Australian Open, overcoming cramps and getting benefit from the tournament's extreme heat policy to beat Eliot Spizzirri.