The Spaniard was blown away by the force of Ben Shelton's game in Canada
"Everything that I have done is thanks to him," Carlos Alcaraz said of Juan Carlos Ferrero.
The Scot sent Italy's Jannik Sinner into the quarterfinal with an abdominal injury.
Diego Schwartzman moves into the US Open main draw.
The US Open will bring the buzz this month.
Diego Schwartzman, Barbora Krejcikova and Karolina Pliskova are among the players sporting new styles.
Upset by Maria Sakkari flicking a stray ball into the crowd, Danielle Collins unloaded.
