(Reuters) - Roger Federer delivered what he called his best match yet since returning from injury as he eased to a 6-1 7-6(10) win over Belgium's David Goffin to reach the semi-finals of the Gerry Weber Open in Halle on Friday.
The Swiss great, who is seeking a ninth title in his traditional Wimbledon grasscourt warm-up event, will feature in his 11th Halle final if he beats rising German talent Alexander Zverev in Saturday's semi-finals.
The top-seeded Federer, who is returning to fitness after missing the French Open with a back injury, raced away with the first set against the fifth seed but completed victory in one hour and 21 minutes after saving five set points in the second.
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"I thought it was my best match thus far," Federer said. "It is a good win for me and I'm clearly very happy to be in the semis."
Next up for the 34-year-old will be Zverev, the 19-year-old who continued his breakthrough season with a 7-6(9) 6-3 win over Marcos Baghdatis of Cyprus.
Federer was impressed with his young opponent, saying: "He's got a big serve, he's got a nice backhand, he's improving his forehand and he's moving forward. He's going to be a tough player in the future, no doubt about it."
The other semi-final will see third-seeded Austrian sensation Dominic Thiem, who is seeking his fifth title of the season, against German Florian Mayer, who beat Italian Andreas Seppi 7-6(4) 6-3 in his quarter-final.
Thiem hoped to repeat his win over Philipp Kohlschreiber in last weekend's Mercedes Cup final but the German pulled out before their last-eight match with a left hip strain.
(Reporting by Ian Chadband; Editing by Toby Davis and Ken Ferris)