Sasi Kumar Mukund got the better of Chinese wonder-kid Yibing Wu but in-form Prajnesh Gunneswaran suffered a shock first round defeat at the ATP Challenger tournament in Shenzen, China.

The 21-year-old Sasi, who qualified into the main draw and has made good progress on the Pro circuit, defeated Wu 7-6 (4) 6-2 in one hour and 20 minutes to move to the second round of the USD 75,000 hard court event on Monday.