Marin Cilic and David Goffin advanced to the semifinals of the Japan Open on Friday, and they will play each other for a spot in the final.
Maria Sharapova returns to the court for the first time since her doping ban was reduced when she makes her World Team Tennis Smash Hits debut next week in Las Vegas.
Angelique Kerber lost for the first time since becoming the No. 1-ranked player, losing to Petra Kvitova in the third round of the Wuhan Open on Wednesday.
Caroline Wozniacki overpowered Japanese teenager Naomi Osaka 7-5, 6-3 to win the Pan Pacific Open on Sunday.
Former world number one Caroline Wozniacki produced a spirited fightback to beat fourth seed Agnieszka Radwanska 4-6, 7-5, 6-4 and reach the Pan Pacific Open final on Saturday.
Second-seeded David Goffin of Belgium beat Germany's Jan-Lennard Struff 6-4, 6-2 on Thursday to reach the quarterfinals of the Moselle Open.
Defending champion Agnieszka Radwanska defeated Rio Olympics gold medalist Monica Puig on Friday to set up a semifinal showdown with Caroline Wozniacki at the Toray Pan Pacific Open in Tokyo.
Milos Raonic was surprisingly ousted by local hope Mikhail Youzhny 2-6, 7-6 (6), 6-4 in the second round of the St. Petersburg Open on Thursday.
Monica Puig rallied to upset 2013 champion Petra Kvitova 1-6, 6-4, 6-4 to reach the Pan Pacific Open quarterfinals on Wednesday.
The Tennis Integrity Unit says French player Constant Lestienne has been banned for seven months for gambling on matches, with half of the sentence suspended.