Los Cabos - Top-seeded Juan Martin del Potro of Argentina breezed into the Mifel Open semi-finals on Thursday night, beating Egor Gerasimov of Belarus 6-1, 6-1.
Del Potro won for the second straight night in the hard-court event after a rest break following a five-set loss to Rafael Nadal in the Wimbledon quarter-finals.
Del Potro has 22 career victories, winning this year on hard-courts at Indian Wells and Acapulco.
In the semi-finals, the 2009 US Open champion will face third-seeded Damir Dzumhur of Bosnia and Herzegovina in the semi-finals. Dzumhur beat American Michael Mmoh 6-2, 6-3.
Dzumhur has three career victories, taking a grass-court tournament in June in Turkey after breaking through last year with indoor titles in Moscow and St. Petersburg.
Second-seeded Fabio Fognini of Italy will play British left-hander Cameron Norrie in the other semi-final. Fognini beat Japan's Yoshihito Nishioka 6-2, 6-2, and Norrie topped fourth-seeded Adrian Mannarino of France 6-4, 6-4.
The 31-year-old Fognini, ranked 15th in the world, is seeking his third victory of the year after winning clay-court tournaments in Bastad and Sao Paolo.
Norrie also reached the semi-finals last week in Atlanta.
Results from ATP Los Cabos Open on Thursday (x denotes seed):
Juan Martín Del Potro (ARG x1) bt Egor Gerasimov (BLR) 6-1, 6-1
Damir Džumhur (BIH x3) bt Michael Mmoh (USA) 6-2, 6-3
Cameron Norrie (GBR) bt Adrian Mannarino (FRA x4) 6-4, 6-4
Fabio Fognini (ITA x2) bt Yoshihito Nishioka (JPN) 6-2, 6-2