Aryna Sabalenka fumbled big time against Diana Shnaider at the French Open. Having led for most of the match, she looked set to book a place in the semifinals. However, an unexpected turnaround would see Shnaider win 10 games in a row and knock out last year’s runner-up 3-6, 7-5, 6-0. Sabalenka’s post-match frustration mirrored her on-court bewilderment, with the Belarusian even remarking that she wanted to “quit” tennis. The words stirred up an…