Top seed Somdev Devvarman [ Images ] and wildcard Karan Rastogi [ Images ] entered the singles second round of the ATP Challenger event in Singapore after scoring contrasting wins in their opening rounds.

While Somdev steamrolled Thai wildcard Peerakiat Sirileuthaiwattana 6-2, 6-1, Rastogi had to work hard for a 6-1, 3-6, 6-4 win over Australia's [ Images ] Brydan Klien at the Kallang tennis centre.

Somdev will next take on 203rd-ranked Australian John Millman, who had to pull out all his experience to scrape past wildcard entrant and world number 284 Sergei Bubka 7-6 (2), 6-7(5), 6-2 in a match lasting two hours and 29 minutes.

Rastogi will clash with former top-20 Russian Dmitry Tursonov, who outplayed sixth seed Ivo Minar of the Czech Republic 6-2, 6-4.

"I started well, but lost my game midway in the match and also played a bad second set, It's great to come back from being broken two times in the third set.

"I'm also happy to have played with a cool head after having to wait on a couple of occasions with my opponent using time to recover from cramps at crucial moments," Rastogi said.