Japan's Ayumi Tanimoto retained the women's 63kg judo title on Tuesday.

CNN: Host nation maintain diving dominance

Clijsters will next face unseeded American Christina McHale, who had a 6-2 6-4 win over Japan's Ayumi Morita.

BBC: Kim Clijsters through in rain-hit Cincinnati Open

And the Russian looked in merciless mood on Court Suzanne Lenglen as she set up a second round clash with Japan's Ayumi Morita.

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The third seed made light work of Japan's Ayumi Morita 6-1 6-3 to set up a fourth round tie against 14th seed Maria Kirilenko from Russia who was also a straight sets winner (7-6 6-3) over Belgium's Yanina Wickmayer.

CNN: Del Potro dumped out by Chardy