Intro:

There were first-round wins for sixth-seed Marcel Granollers, Florian Mayer and Viktor Troicki at the Gerry Weber Open in Halle, Germany on Tuesday (12th June).

Tommy Haas also advanced after Bernard Tomic was forced to retire through illness.

Script:

With the clay-court season over, the players' attention has turned to grass, with many of the top players in action at the Wimbledon warm-up tournament in Halle, Germany on Tuesday (12th June).

Sixth-seeded Marcel Granollers of Spain overcame spirited resistance from Mischa Zverev of Germany, ranked 190, to reach the second round, the final score 6-4, 6-2.

But Florian Mayer raised the spirits of the German supporters, beating American qualifier Tim Smyczek in straight sets to set up a daunting second-round encounter against five-time winner Roger Federer.

Serbia's Viktor Troicki will meet third-seed Tomas Berdych in round two.

He saw off the challenge from Benjamin Becker of Germany 6-2, 7-6(6).

Meanwhile Australian teenager Bernard Tomic emerged as a Wimbledon worry after being forced to retire citing sickness towards the end of his first set against veteran German Tommy Haas.

Last year 19-year-old Tomic became the youngest player since Boris Becker to reach the quarter-finals of Wimbledon.