Metz, France: Eighth-seeded David Goffin of Belgium rallied to beat top-seeded Jo-Wilfried Tsonga 1-6, 7-6 (5), 7-5 on Friday to reach the Moselle Open semi-finals.
Goffin next plays Germany's Jan-Lennard Struff for the first time. Struff advanced after third-seeded Philipp Kohlschreiber retired when trailing 5-0 after just 20 minutes.
Second-seeded Gael Monfils of France also went through to the last four, hitting 12 aces in a convincing 6-3, 6-4 win against seventh-seeded Jerzy Janowicz of Poland. Monfils did not face a single break point, while breaking the Polish player's serve twice.