Veteran 38-year-old Wallabies playmaker Quade Cooper says he never retired and is eyeing a comeback for next year's World Cup on home soil.

Australian five-time Olympic gold medallist Mollie O'Callaghan pulled out of the looming Pan Pacific Championships on Saturday due to injury.

Defending champion Alex de Minaur and second-seeded Ben Shelton were bounced out of the Washington Open on Friday as upsets marked the quarter-finals of the combined ATP and WTA event.

Sinesipho Dambile produced his best performance on the track yet, storming to victory in the 200m.

FIFA president Gianni Infantino said on Saturday he has scrapped a plan to allow private investment in the World Cup following fierce backlash from football officials worldwide.