The world number one led by a set and a double-break before exiting the tournament in a blaze of unforced errors, collapsing to a 3-6, 7-5, 6-0 loss in blustery conditions on Court Philippe Chatrier.

Shnaider will face Polish qualifier Maja Chwalinska in the semi-finals on Thursday.

Sabalenka was the only Grand Slam champion left in either the men’s or women’s singles draws, but belied that status by making a whopping 57 unforced errors.

Left-hander Shnaider was playing in her first major quarter-final, but now finds herself a strong favourite to reach the final heading into her last-four tie against world number 114 Chwalinska.

Sabalenka’s scarcely believable defeat was reminiscent of the way she threw away a strong position in last year’s final against Coco Gauff.

The Belarusian was playing in a 14th consecutive Grand Slam quarter-final but failed to become the first woman to make seven straight major semis since Serena Williams.