Samantha Stosur of Australia hits a return against Carla Suarez Navarro of Spain in their women's singles match on the third day at the Brisbane International tennis tournament on January 5, 2016. AFP PHOTO / Saeed KHAN -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE / AFP / SAEED KHAN        (Photo credit should read SAEED KHAN/AFP/Getty Images)
 SAEED KHAN/AFP/Getty Images

Samantha Stosur has refused to make any bold predictions for her Australian Open campaign after suffering a shock straight sets defeat to little-known world No.94 Monica Puig at the Sydney International.

Stosur's hopes of winning a maiden Sydney title crashed and burned with a 6-4 6-4 quarter-final loss on Wednesday night and she will now heads to Melbourne with little expectation from the Australian public about her chances.

Stosur had stormed into the quarters with a comprehensive victory over Daniela Hantuchova on Tuesday, but Puig served 14 aces to Stosur's five and broke the Australia once in each set to prevail for the first time in five matches between the pair.