Halle - Fifth-seeded Viktor Troicki and eighth-seeded Milos Raonic both breezed into the second round of the Gerry Weber Open with easy victories on Tuesday.
Troicki, who helped Serbia win the 2010 Davis Cup title, needed just 53 minutes to get past Mischa Zverev of Germany 6-2, 6-3. Troicki will next play Igor Andreev of Russia in the second round of the Wimbledon warm-up tournament.
Raonic took just a bit longer to dispatch of Pablo Andujar of Spain 6-3, 6-1. The 20-year-old Canadian's second-round opponent will be Tobias Kamke of Germany.
The sixth-seeded Florian Mayer had a harder time beating German compatriot Dustin Brown 7-6 (6), 2-6, 6-3.
Mayer, who next plays Yen-hsun Lu of Taiwan, came into the tournament with his highest ever ranking at No. 18. He is also his country's No. 1, but said that was of no significance.
"Of course I have more self-confidence, but that's because I'm number 18 in the world not because I'm number one in Germany, Mayer said.
"The most important thing for me is to move further up the world rankings.
"If someone else, Philipp Kohlschreiber or Philipp Petzschner, would be 15th and I were 16 or 17, my self-confidence would be the same as Germany's number 2."
Petzschner also reached the second round on Tuesday with a 6-2, 7-6 (5) win over another German, Dominik Meffert, and will next face Daniel Gimeno-Traver of Spain, who came back for a 1-6, 7-6 (5), 6-2 victory over Kazakhstan's Andrey Golubev.