The Sydney International has been rocked by the withdrawal of the top two men's seeds with French duo Jo-Wilfried Tsonga and Richard Gasquet pulling out of the Australian Open lead-up event.
World No.8 Tsonga, who was to be top seed at Sydney Olympic Park, suffered a hamstring injury while representing France in the Hopman Cup on Friday night.
"Unfortunately Jo-Wilfried Tsonga sustained an injury in Perth and has been forced to pull out of the Apia International Sydney with a left hamstring injury," tournament director Craig Watson said.
"We wish him a speedy recovery and all the best for a successful Australian Open."
Tsonga - the 2008 Australian Open finalist - was to have been replaced as top seed by compatriot and world No.10 Gasquet before he too pulled out due to personal reasons.