Record Heat At Roland Garros: Six Retirements And The WBGT Protocol In Action

Six players retired in the first two days of the Roland Garros 2026 draw, while Paris entered Météo-France's yellow alert for a heatwave expected to push temperatures up to 37 degrees during the first week. On Sunday and Monday the thermometer already hit 33 degrees on court, unprecedented values in recent memory for late May in the French capital.

Gabriel Diallo was the most discussed case: the Canadian stopped against James Duckworth down 3-6, 1-4, and explained in the press conference that he had retired "due to heatstroke". Casper Ruud, after losing the fourth set 0-6 against Roman Safiullin and then winning the fifth 6-2 (final score 6-2, 7-6(5), 5-7, 0-6, 6-2 in three hours and fifty-six minutes), said he had played for long stretches "like a zombie", on the verge of retiring. Alexandre Müller, Cameron Norrie, Sebastián Báez, Moyuka Uchijima and Elena-Gabriela Ruse all threw in the towel during the first two days, on top of the twelve pre-match withdrawals already recorded in the main draw.

The new development is not so much the heat itself, but the fact that the Parisian Slam is operating under a structured heat protocol based on Wet Bulb Globe Temperature, the combined measure of temperature, humidity, solar radiation and wind used in sports physiology. The threshold is clear: at 30.1 degrees WBGT, ten-minute cooling breaks kick in, between the second and third set for women and between the third and fourth for men in best-of-five Slams; at 32.2 degrees play is suspended. The same WBGT thresholds will also come into effect on the ATP Tour from 2026, with the break placed after the second set in best-of-three matches, after years of disparity with the WTA.

What remains in the background is a question the tennis calendar struggles to address: Roland Garros is played in late May for historical reasons, not climatic ones, and a week like this, with a court growing drier and faster due to the heat and players stopping for heatstroke before even reaching the second week, suggests that the Parisian window is becoming structurally narrower than the rulebook can cover.