Maria Sharapova reached the US Open second round on Monday before jokingly admitting that the subject of pregnancy came up during recent tests into a mystery stomach problem.

The Russian superstar eased to a 6-2, 6-2 win over Hungary's Melinda Czink in her first match since finishing with a silver medal at the Olympics.

Sharapova then pulled out of the Montreal and Cincinnati tournaments with a stomach problem that left her in severe pain as well as her head in a spin after undergoing an ultrasound examination.