World number two Coco Gauff was sent crashing out of Wimbledon by American compatriot Emma Navarro on Sunday as Carlos Alcaraz and Jannik Sinner were firmly locked on an All England Club semi-final collision course. Gauff's 6-4, 6-3 fourth round defeat means that only two of the top 10 women's seeds are left in the tournament. Elsewhere, unheralded Lulu Sun became the first New Zealand woman to reach the last-eight at Wimbledon, while Madison Keys quit her last-16 clash in floods of tears. Navarro, ranked 19th, reached the quarter-finals of a Grand Slam for the first time with her defeat of US Open champion Gauff.