Roger Federer and Novak Djokovic were beaten in the doubles at the Laver Cup.
Dominic Thiem said he was lucky to beat Daniil Medvedev in his homeland to reach the last four in St. Petersburg.
There will be no repeat Korea Open triumph for Jelena Ostapenko, who was beaten comfortably by Ekaterina Alexandrova on Friday.
The two officially will be announced as co-owners Friday at Dodger Stadium before the team’s game against the Padres.
Naomi Osaka's impressive homecoming moved up a gear as she moved into the semi-finals at the Tokyo Open.
Serena Williams is "fighting for equality", according to LeBron James, who said he feels her "struggle".
French Open finalist Dominic Thiem has followed up making the last eight at the US Open by reaching the St Petersburg Open's quarter-finals.
Defending Korea Open champion Jelena Ostapenko was made to wait to play her second-round match on Thursday due to heavy rain.
Caroline Wozniacki had no answer to the brilliance of the unseeded Camila Giorgi in Toyko, ending her dreams of a third successive title.
Naomi Osaka expects to be more comfortable being in the limelight as she gains more experience on and off court.
Great Britain's Andy Murray will participate in tournaments in Shenzhen and Beijing, but will skip Masters events in Shanghai and Paris.
Kiki Bertens claimed her seventh WTA Tour title and third of the year after a win over Ajla Tomljanovic in the Korea Open final.
Nao Hibino improved her record against Eugenie Bouchard to 3-0 in 2018 with a 6-3 6-3 victory at the Tashkent Open on Monday.
Anett Kontaveit fought back from a set down to stun ninth seed Sloane Stephens in the opening round of the Wuhan Open in China.
Martin Klizan had won all six finals he had played in until he came up against an inspired Dominic Thiem in St. Petersburg.
Roger Federer was struck by a Novak Djokovic forehand but Jack Sock gave the Serbian a dose of karma later in the Laver Cup.
Martin Klizan inflicted a semj-final defeat on Stan Wawrinka in St. Petersburg and will take on top seed Dominic Thiem in the final.