World No.1 Jannik Sinner has ruthlessly underlined his US Open title favouritism as he ended the gallant run of Australian Chris O'Connell.
O'Connell was unable to match the heroics of fellow Sydneysiders Alexei Popyrin, Alex de Minaur and Jordan Thompson, who all advanced to the fourth round, as he succumbed 6-1 6-4 6-2 to Sinner in New York on Saturday.
After needing four sets to get through his opener, Sinner has dropped just 13 games in his past two matches, at an average of only two a set.