Somdev Devvarman defeated Alex Bogolomov Jr. in three sets to book a quarter-final berth in the singles event of the ATP Challenger tennis tournament in Aptos, USA.The second seed Somdev faced stiff competition from the American before triumphing 6-2, 5-7, 6-3 in the second round of the event. Somdev will next face Briton seventh seed AlexBogdanovic, who got a walkover from Slovakia's Karol Beck. Beck suffered an injury in his right shoulder and decided to opt out of the contest.