Croatia's Ivan Ljubicic rallied to beat Juan Monaco in three sets to reach the semi-finals of the Indian Wells ATP Masters 1000.
In the semi-finals Ljubicic will face either defending champion and third seed Rafael Nadal or Czech Tomas Berdych.
In women's action, sixth-seeded Jelena Jankovic led the way into the semi-finals with a 6-4, 6-4 victory over Russian Alisa Kleybanova.
Jankovic will face the winner of the night match between eighth-seeded Samantha Stosur of Australia and Spain's Maria Jose Martinez Sanchez.