<p>World number 62 Collignon produced a brilliant display to beat the American number one 6-4, 7-5, 6-4.</p><p>The result leaves world number six Felix Auger-Aliassime as the highest-ranked player left in the top half of the men's draw after overwhelming title favourite Jannik Sinner was dumped out by Juan Manuel Cerundolo earlier Thursday.</p><p>Collignon, who also reached the US Open third round last year, will face either Matteo Arnaldi or former runner-up Stefanos Tsitsipas for a last-16 berth.</p><p>It is the first time big-hitting left-hander Shelton has exited a Grand Slam event before the third round since Wimbledon in 2023.</p>