In the women's draw, defending champion Garbine Muguruza will play 2010 French Open winner Francesca Schiavone
Hong Kong's first WTA tennis tournament in more than 20 years suffered a major blow on Sunday with main drawcard Eugenie Bouchard withdrawing on medical advice after suffering from the heat at the U.S. Open.
Twice Australian Open champion Victoria Azarenka overcame an inspired challenge from qualifier Aleksandra Krunic of Serbia 4-6, 6-4, 6-4 on Monday to advance to the quarter-finals of the US Open.
Zverev, who is looking for his fourth tournament win of the year, needed only 64 minutes to defeat Nishikori and move into the final in WashingtonDC where he will play Kevin Anderson after the South African beat Jack Sock by the same score.
China's No 1 Li Na has ruled herself out of playing at the 2016 Rio Olympics, the 31-year-old said at the Australian Open on Friday.
Slovakia's Dominika Cibulkova stunned top seed Agniezka Radwanska and then trounced Monica Puig to reach the Aegon International at Eastbourne on Friday.
India's Rohan Bopanna inched closer towards his second Grand Slam title by reaching the mixed doubles final of the Australian Open along with Hungarian partner Timea Babos, in Melbourne on Friday.
Iron-willed Czech Tomas Berdych ended eight years of tyranny under nemesis Rafa Nadal to storm into the Australian Open semi-finals on Tuesday before his next opponent Andy Murray restored British colonial rule to the floodlit centre court.
Images from Day 6 of the Australian Open in Melbourne, on Saturday.
Zverev defeated Anderson 6-4, 6-4 and captured his fourth title of the year in the finals played on Sunday.
Multiple grand slam champion Maria Sharapova withdrew from the Brisbane International on Tuesday after suffering an arm injury in practise less than two weeks before the Australian Open.
Canadian tennis star Eugenie Bouchard called Maria Sharapova as a 'cheater' over her return from a drugs ban and suggested the Russian should be banned for life.
Rafael Nadal weathered an early serving storm from Kevin Anderson before dismantling the South African giant with a 7-5, 6-1, 6-4 masterclass to reach the quarter-finals of the Australian Open on Sunday.
He leads the men's seedings ahead of defending champ Roger Federer, with Bulgarian Grigor Dimitrov seeded third.
India's Sania Mirza and Martina Hingis battled past defending champions Medina Garrigues and Yaroslava Shvedova to not only reach the semi-finals of the WTA Family Circle Cup but also secure the top place in the team rankings in the 'Road To Singapore'.
Top seeds Sania Mirza and Martina Hingis entered the final at the Madrid Open after a crushing 6-2, 6-0 victory over Vania King and Alla Kudryavtseva on Friday. It is the second successive final for the Indo-Swiss pair following the runners-up finish in Stuttgart.
Indian tennis ace Sania Mirza and her Zimbabwean partner Cara Black were halted in their stride by the world No 1 Italian pair of Sara Errani and Roberta Vinci in the women's doubles quarter-finals at the Australian Open in Mlebourne on Tuesday. The sixth seeds lost 2-6, 6-3, 4-6.
Johanna Konta's exhilarating run at the Australian Open was finally halted by Angelique Kerber in the semi-finals on Thursday, but the Briton leaves Melbourne Park 'hungry' for more Grand Slam success.
Johanna Konta earned the chance to fulfill a childhood dream when she advanced to an Australian Open quarter-final contest against Serena Williams by dismantling Ekaterina Makarova 6-1, 6-4 on Monday.
India's Sania Mirza and her partner Martina Hingis staged a superb comeback to clinch the women's doubles title after a thrilling victory against Russian duo of Elena Vesnina and Ekaterina Makarova in the final, on Saturday.
After a 48-minute battering at the hands of Serena Williams on Wimbledon's Centre Court on Thursday, the last words Elena Vesnina probably wanted to hear were 'see you later'.
For all their success together, the red dirt isn't Sania Mirza and Martina Hingis' most favourite surface.
Venus Williams is planning to return to Wimbledon next year to make her 20th appearance confident in the belief that there is no such thing in life as impossible. The oldest woman in the draw at 36, Williams lost 6-4 6-4 to Germany's Angelique Kerber on Thursday but has enjoyed something of a renaissance in reaching her first grand slam semi-final since 2010. She returned to the world's top 10 last year following a frustrating run of results since she revealed in 2011 that she had been diagnosed with Sjogren's syndrome, an auto-immune disease that leaves her short of energy.
Former world number one Maria Sharapova avenged her US Open loss to Anastasija Sevastova with a 7-6(3), 5-7, 7-6(7) victory over the Latvian in the China Open first round on Saturday.
'I took the wildcard for Eastbourne and it's great to be feeling the grass again, and I'm happy the clay court season is already finished.'
Sania Mirza set herself up for her first-ever women's doubles Grand Slam title, while seasoned pro Leander Paes is now one win away from his 16th Major trophy as the two Indians reached the Wimbledon finals with their respective partners.
Alize Cornet fought tooth and nail but the local favourite's French Open run came to an end when she was knocked out 6-2, 7-6(9) in the fourth round by Ukrainian 19th seed Elina Svitolina on Sunday.
Australia's Samantha Stosur failed to allay fears she could be heading for another early exit at her home Grand Slam with a scrappy performance in Hobart while a trio of big names tumbled out of the Sydney International on Monday.
Top-seeded Serena Williams said on Friday that she was not sure about the state of her balky right shoulder but felt more relaxed entering next week's US Open than last year.
US tennis powerhouse Serena Williams dispatched France's Alize Cornet in two sets on Monday, ending a streak of weak family performances that saw older sister Venus eliminated from singles on Saturday and the pair knocked out in doubles on Sunday.
Top seeds Novak Djokovic and Serena Williams face challenging early tests at the US Open following Friday's draws for the year's last Grand Slam starting on Monday.
With not one, or two but three passports in her possession, Britain's Johanna Konta could have been forgiven for suffering an identity crisis.
Photos from the matches played at the Miami Open on Tuesday
IMAGES from Day 6 of the Australian Open in Melbourne, on Saturday.
Serbia's Novak Djokovic is the top seed in the men's draw which includes five-times US Open champion and 17-times Grand Slam winner Roger Federer as seventh seed - his first time the Swiss has been placed outside the top three in a Grand Slam in over ten years.
Indian tennis star Sania Mirza and her Swiss partner Martina Hingis said sheer belief pulled them through.
Serena Williams and Marin Cilic both survived third round scares on Friday to keep their US Open title defences on track but there was no escape for Rafael Nadal with the twice-winner going down in a late night thriller.
World No 2 Rafael Nadal sailed into the quarter-finals of the China Open, his first tournament in 13 weeks, with a 6-3, 6-4 win over German qualifier Peter Gojowczyk on Thursday.
World No 1s Andy Murray and Angelique Kerber have been named top seeds for the first major of the season, Australian Open, which will commences on January 16.
Rediff.com gives you a flashback of these events in pictures snapped right here...