Lleyton Hewitt's former coach, Darren Cahill, is optimistic about the 2001 champion's prospects of continuing his improbable march at the US Open, four years after Hewitt reach his last major singles quarter-final.
"It's been a great run, but I still don't think the run is done,'' said Cahill, still a coach and now also an admired commentator with ESPN, told Fairfax Media. "I think there's still more tennis left in him.
"He certainly has a decent opportunity to get through to the quarters, and this is where he belongs. He belongs back on the big stage playing this type of tennis, so I couldn't be happier for him.''
Cahill was in Andre Agassi's corner when the great American won the last of his eight major singles titles, as a 32-year-old at the 2003 Australian Open. He split with Hewitt at the end of 2001, when the Australian had just become the youngest No.1 in ATP rankings history. Wimbledon, the scene of Hewitt's second grand slam singles success, in 2002, also hosted his most recent grand slam quarter-final - a five-set loss to Andy Roddick in 2009.
Having already eliminated wildcard American Brian Baker, sixth seed Juan Martin del Potro and unseeded Russian Evgeny Donskoy, the 32-year-old South Australian plays Russian 21st seed Mikhail Youzhny, over whom he holds a 5-1 advantage - the score is 2-1 on hardcourts - in Tuesday's fourth round at Flushing Meadows.
Hewitt travelled in from his base in Greenwich, Connecticut with hitting partner and co-coach Peter Luczak for a gym session and what was expected to be an indoor practice, given the wet courts and dripping skies, as rain again disrupted the US Open schedule on Monday.
Tenth seed Roberta Vinci's 6-4, 6-2 defeat of fellow Italian Camila Giorgi was the only singles fourth-rounder completed before a lengthy delay, Vinci now meets Fed Cup teammate Flavia Pennetta, a 6-2, 7-6 (7-3) victor over Simona Halep. The Victoria Azarenka-Ana Ivanovic quarter-final was cancelled, and five-time champion Roger Federer's fourth round contest with Spain's Tommy Robredo shifted off Arthur Ashe to Louis Armstrong Stadium.
Australian eighth seeds Ashleigh Barty and Casey Dellacqua have reached the quarter-finals of the women's doubles but Sara Tomic was beaten in the first round of the girls' singles, as were Brad Mousley and Harry Bourchier in the boys'. Australian Open junior finalist Thanasi Kokkinakis is yet to play.