New Delhi, May 29 -- Despite an unprecedented heat wave at the French Open, the tournament's extreme weather policy has not been activated this week.

And even if it had been, it's unlikely that the retractable roof on Court Philippe-Chatrier would have been closed before or during top-ranked Jannik Sinner's loss.

According to the policy, if the Wet Bulb Globe Temperature (WBGT) - which takes into account temperature, humidity, sun, wind and other factors - reaches 30.1 degrees Celsius (86 Fahrenheit) or higher, 10-minute cooling breaks can be added between the second and third sets for women's matches and between the third and fourth sets for men's matches.

"If the WBGT hits 32.2 C (90 F), play is suspended. this activates around 100 F...