Prakash Amritraj, in partnership with Philipp Oswald of Austria, beat Hiroki Kondo of Japan and Chu-Huan Yi of Chinese Taipei 5-7, 6-4, 10-6 in the doubles quarterfinals of the $50,000 ATP Challenger tennis tournament in Yokohama, Japan.

The Indo-Austrian pair will meet Andrea Arnaboldi and Matteo Viola of Italy in the semifinals. The top-seeded Ratiwatana twins, Sanchai and Sonchat, have already booked their berth in the final, without dropping a set in three rounds.

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