Rafael Nadal booked his semi-final spot at the Mexico Open by battling past Yoshihito Nishioka in straight sets, while top seed Novak Djokovic suffered another stunning exit in a shaky start to 2017.
Novak Djokovic rallied to beat Argentinian Juan Martin Del Potro in three sets 4-6, 6-4, 6-4 early on Thursday to advance to the Mexican Open quarterfinals.
Novak Djokovic beat Slovakia's Martin Klizan 6-3, 7-6 (4) in the opening round of the Mexican Open on Tuesday.
Novak Djokovic said Monday he is ready to atone for his shock Australian Open exit as he prepares to return to action in Acapulco.
Marseille winner Jo-Wilfried Tsonga returned to the world's top 10 when the ATP rankings were released on Monday.
Elina Svitolina of Ukraine is set to debut in the top 10 after winning her second title of the season at the Dubai Tennis Championships on Saturday.
Angelique Kerber said she needed to nurse her injured knee after a semifinal defeat at the Dubai Tennis Championships on Friday ended her chances of reclaiming the world number one ranking.
Second-seeded Karolina Pliskova and third-seeded Dominika Cibulkova both lost their opening matches at the Dubai Tennis Championships on Tuesday.
In an all-American matchup, Alison Riske upset 11th-seeded Coco Vandeweghe 6-4, 6-4 to move into the second round at the Dubai Championships on Monday.
Ryan Harrison served up the ace that won him his first career ATP World Tour title, then stuck both hands over his head pointing index fingers skyward in celebration.