Jannik Sinner faced significant heat challenges at the French Open, struggling with dizziness and nausea during his second-round clash against Juan Manuel Cerúndolo.
## What happened?
The 2026 French Open was marked by unexpected upsets and extreme heat, with temperatures soaring to 91.4°F (33°C) and players like Jannik Sinner and Casper Ruud struggling to cope.
Casper Ruud battled severe physical discomfort during his first-round clash with Roman Safiullin, feeling like a "zombie" after emerging victorious in a grueling five-set encounter.
## Why it matters for Jannik Sinner
Jannik Sinner's experience with heat-related issues is not new, having previously struggled with cramping in hot conditions in Shanghai and Melbourne.
The world No. 1 insisted that the warm weather was not a major factor in his physical issues, but the heat could not have helped.
## What comes next?
The intense heat wave in France has led to the cancellation of ITF events, including the women's W35 event in Périgueux and the men's M25 tournament in Montauban.
Jannik Sinner and other tennis stars will likely face similar challenging conditions during their upcoming campaigns at the Wimbledon Championships, with the UK Met Office forecasters issuing an "extreme heat warning" for parts of England.
The decision to cancel ITF events was made after the regional government prohibited sporting events under a red heat wave alert, with temperatures rising as high as 107.4°F (41.9°C) in parts of France.
And the French Open's heat policy has been criticized by Novak Djokovic amid growing concerns over player welfare.
So the upcoming Wimbledon Championships will be a significant test for Jannik Sinner and other players, with the heat expected to be a major factor.
But Jannik Sinner is not the only player to have spoken out about the extreme temperatures, with Jakub Menšík, Daria Kasatkina, and Jeļena Ostapenko also expressing their concerns.
The ITF stated that the tournament has indoor courts on site, but these are not air-conditioned and are therefore not permitted to be used under the red heat wave alert.
As a result, the safety of all players is the top priority, and the cancellation of ITF events is a necessary measure to guarantee their well-being.