Alex de Minaur has claimed his biggest grand slam scalp to surge into the US Open fourth round in New York.

Australian tennis’ 20-year-old livewire wowed fans his 6-2 6-4 2-6 6-3 triumph over seventh-seeded former Open runner-up Kei Nishikori on Friday.

The pulsating victory vaulted de Minaur into the last 16 at a major for the first time and left him one win away from a potential quarter-final showdown with Roger Federer.