Ashleigh Barty has defeated Maria Sharapova at the Australian Open this year.
Pakistan has been forced to host Davis Cup ties at neutral venues for more than a decade as teams refused to travel to the country on security concerns.
Andy Murray later announced he will not be playing singles in the US Open, which begins in two weeks.
Venus Williams wins 7-5 6-2 as she maintains her streak of never having lost a set to Lauren Davis.
The announcement comes a few hours after Rafael Nadal won his fifth Canadian title over Russian Daniil Medvedev.
Bianca Andreescu does not want to take any risks after missing more than two months – and Wimbledon – due to shoulder problems.
The Spanish world number two retained his crown with a 6-3 6-0 victory over the eighth-seeded Daniil Medvedev in their first-ever meeting.
Serena is hoping for a 24th career Grand Slam title at the US Open, but it is unclear if injuries will continue to set her back.
As Williams seeks her first title since 2017, Andreescu is hoping to become the first Canadian in 50 years to lift the trophy.
Monfils retires after an ankle injury making way for the King of clay to take on Daniil Medvedev at the finals.
The match also means Monfils is left with just a few hours to prepare to take on Rafa as his quarter-final game was disrupted and delayed due to rain.
Nadal says the match against Fognini was up-and-down, nevertheless he managed to defeat his opponent, making his way to the semis.
Grand Slam champ Maria Sharapova has her hopes dashed over a comeback after being defeated by Anett Kontaveit at the fourth-round of the WTA Toronto tournament.
Serena Williams could face rival Naomi Osaka again in the WTA Toronto quarter-finals.
Thiem's defeat today is due to not having enough rest from travelling after a match in his home, Austria.
Both Serena Williams and Naomi Osaka are set to face each other in the quarterfinals of the WTA tournament after straight-set victories on Thursday.
In defeating Guido Pella, Rafael Nadal now has the most wins in the ATP Masters series.
Pliskova battles hard to reclaim the world no.1 spot, hoping to make her way to the semis.
Thiem came to Canada after winning the Kitzbuhel clay court title at home last weekend.
The reigning US and Australian Open champion, Naomi Osaka, won after taking the first set 6-2 when Germany's Tatjana Maria retired with a left abdominal injury.
Despite requesting a medical timeout during the game, Halep surprises the crowd by defeating Brady during the second-half of the game.
Karolina Pliskova must go all out to fight back for the number one spot, while facing a tough contender, Naomi Osaka.
Rain did not hinder Rafael Nadal to reach the third round of the ATP Montreal Masters.
Kyrgios, who has come under fire for his inconsistency, says he is trying to get to a period where he can bring his A-game every week.