India's Somdev Devvarman has entered the second round of the Wimbledon men's singles event after his German opponent Denis Gremelmayr retired hurt midway through the first round match in London last night. Somdev was leading 6-4, 4-2 when Gremelmayr conceded the match to the Indian.Somdev will next face 18th seed Mikhail Youzhny of Russia, who defeated Argentine Juan Monaco 4-6, 6-2, 6-2, 4-6, 6-4 in the first round. India's Sania Mirza has bowed out of the women's singles event. In her first round match, she lost to France's Virginie Razzano in three sets 6-7, 6-2, 3-6.