Melbourne, Australia, 15 January 2013 | AAP

Three Australians still remain in the Australian Open after Jarmila Gajdosova joined the ranks of the fallen with a first round loss to Belgian 20th seed Yanina Wickmayer at Melbourne Park.

Gajdosova was defeated 6-1 7-5 in one hour and 20 minutes on Rod Laver Arena, failing to take several opportunities in the second set to climb back into the match.

The 26-year-old Australian had a set point in the second set to take the match to a decider, but couldn’t convert it.

Wickmayer then broke serve immediately afterwards and closed out the set with little fuss.

Gajdosova had twice broken Wickmayer’s serve in the second set, but was unable to take advantage as the Belgian bounced back each time.

Wickmayer, 23, will play Slovakia’s Jana Cepelova in the second round.

Gajdosova’s exit means that of the 16 Australians in the main draw of men’s and women’s singles, three still remain.

Samantha Stosur is the sole survivor in the women’s draw, while Bernard Tomic and James Duckworth remain in the men’s singles.