India, Feb. 12 -- Top seed Jay Clarke of Britain suffered a first-round exit in singles, losing to Ioannis Xilas of Greece, at the Chennai Open ATP Challenger Men's International Tennis Championship on Wednesday. However, the top two seeded pairs in doubles - Niki Kaliyanda Poonacha/Pruchya Isaro and Saketh Myneni/Siddhant Banthia - advanced to the quarter-finals. Clarke, ranked Number 183 in the ATP rankings, broke Xilas early in the first set to take a 3-0 lead.

But the 24-year-old Xilas struck back strongly, breaking serve and controlling the match to register a 6-4, 6-4 win. In another first-round singles match, Indian qualifier Aryan Lakshmanan competed strongly in the opening set before going down to Poland's Maks Kasnikowski 5-7, ...