India's Somdev Devvarman and his partner Rik De Voest of South Africa today entered the semifinal of the men's doubles event at the Singapore ATP challenger tennis tournament. They defeated Dmitry Tursonov of Russia and Chinese Taipei's Jimmy Wang 6-4 3-6 10-7 in Singapore.The pair will take on second seeds Sonchai and Sonchat Ratiwatana of Thailand in the semifinals. Devvarman has also made it to the quarterfinals of the singles event after registering a comfortable straight sets victory over Australian John Millman yesterday.