There were contrasting fortunes for two former title winners in Monday’s ATP Tour events, with Mikhail Kukushkin advancing in Russia.
Mikhail Kukushkin came through his first-round clash at the St Petersburg Open, but former Moselle Open champion Peter Gojowczyk crashed out in Metz.
There were just two main-draw matches in Russia on Monday, with seeds Kukushkin and Adrian Mannarino progressing.
Kukushkin won the tournament in 2010 for his first and only ATP Tour title to date, and the sixth seed had too much for Jannik Sinner in their opener, advancing 6-3 7-6 (7-4).
Meanwhile, Mannarino, the seventh seed, eased past Stefano Travaglia 7-5 6-2.
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At the Moselle Open, however, the one-time winner in action was not able to reach the second round, with Gojowczyk undone by Filip Krajinovic.
Gojowczyk beat Benoit Paire in the 2017 final but went down 7-5 6-4 on Monday.
Fernando Verdasco has struggled for form in recent months – winning twice since Wimbledon – but got the better of Steve Darcis 6-2 6-2, while Frenchman Antoine Hoang defeated Cedrik-Marcel Stebe.