Third seed Juan Martin del Potro crushed Croatia's Borna Coric 6-4 6-3 6-1 at the US Open on Sunday to set up a quarter-final clash with American John Isner.
The Argentine sent down nine aces and 33 winners to seal a one-sided victory over the 20th seed in just over two hours, with Coric making 30 unforced errors to undermine his own cause.
Del Potro, champion in 2009, got an early break to go 3-1 up in the first before Coric fought back to level at 4-4, converting the only break point he carved out in the match.
The opener looked to be heading for a tie-break before Del Potro dispatched a backhand volley to earn himself two more break points in the 10th game.
Coric rallied for deuce but double-faulted to give Del Potro another break point opportunity and conceded the set with an unforced error.
"I think that moment was the key of the match," Del Potro said in an on-court interview. "It gave me confidence."
Both players suffered in the humid conditions under the floodlights at Arthur Ashe Stadium, but Del Potro fed off the energy of the crowd, including a group of his friends who have travelled from his hometown Tandil to cheer him on.
"They are crazy," he added with a smile. "They have to go back to Argentina and work again after this tournament. I would like to keep them singing."
Next up for Del Potro is 11th seed Isner, who won his second five-setter of the tournament to see off Canada's Milos Raonic earlier in the day.
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Tennis is back on Sky Sports screens with the Laver Cup in September while we will also have coverage of the ATP Finals in November with every match live on Sky Sports. But first, we will be across the final major of the year in New York as the US Open right through to the final with live blogs, reports, features and reaction.