Mischa Zverev took some of the limelight back from younger brother Alexander when he beat second seed Kei Nishikori to reach the Geneva Open final on Friday.
Rafael Nadal maintained his ominous claycourt form by seizing back the Barcelona Open title from Kei Nishikori with a 6-4, 7-5 victory on Sunday, matching Guillermo Vilas's record title haul on the surface.
Local hero Kei Nishikori claimed his second Japan Open title on Sunday, overcoming familiar foe Milos Raonic 7-6(5), 4-6, 6-4 in the final under a closed roof at the Ariake Colosseum.
Croatia's Marin Cilic swept past Japan's Kei Nishikori 6-3, 6-3, 6-3 to win the U.S. Open on Monday and reach the pinnacle of the sport one year after a doping ban kept him out of the year's final Grand Slam.
Four more performances like that at the O2 Arena this week should guarantee Andy Murray will end 2016 leading the pack.
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.
David Ferrer won a record-equalling fourth Mexican Open title with a 6-3, 7-5 victory over Kei Nishikori in the Acapulco hardcourt final.
Argentina's Juan Martin del Potro won a semi-final thriller against Spain's Rafa Nadal on Saturday, outgunning the Spaniard 5-7, 6-4, 7-6(5) in a nervy final set tie-breaker to advance to the Olympic singles final.
Former world number one Novak Djokovic showed signs of a return to form with an impressive 7-5, 6-4 victory over Japan's Kei Nishikori in the opening round of the Madrid Open on Monday.
Former champion Naomi Osaka was sent packing from Indian Wells after losing in straight sets to Colombia's Camila Osorio.
Rafael Nadal clinched a record-extending 11th Monte Carlo title as he geared up for his French Open campaign with a 6-3, 6-2 victory over Japan's Kei Nishikori in the final on Sunday.
Aryna Sabalenka opened her bid for a third straight Australian Open title with an easy victory over Sloane Stephens on Sunday.
World number four Stan Wawrinka began the new season with a straight-sets victory over Viktor Troicki in his Brisbane International debut on Wednesday. Second seed Wawrinka edged out Troicki 7-6(5) 6-4 to maintain his perfect record against the Serbian whose seventh attempt at beating the Swiss failed at the Pat Rafter Arena. "I'm quite happy with my level at the start the year," Wawrinka said.
Japan has extended a state of emergency in Tokyo and three other areas until the end of May as the country battles a surge in COVID-19 cases
Andy Murray put down an early warning for the Davis Cup final when he dismantled David Goffin 6-1, 6-0 in awe-inspiring fashion to reach the quarter-finals of the Paris Masters on Thursday.
Serena Williams and Ekaterina Makarova sprinted into the semi-finals of the U.S. Open on Wednesday but marathon man Kei Nishikori had to go the distance to upset Stan Wawrinka and become the first Japanese man into the last four of a grand slam in 81 years.
Japan continued to maintain a keen interest in both singles tournaments at Wimbledon after Kei Nishikori advanced to the third round with a win over Ukrainian Sergiy Stakhovsky on Wednesday and Naomi Osaka followed suit in the women's draw.
It may have been the Labor Day holiday in the United States on Monday but Andy Murray came ready to work, demolishing Grigor Dimitrov 6-1, 6-2, 6-2 to storm into the quarter-finals of the US Open.
Japan's Kei Nishikori, who will arrive at Roland Garros without an ATP title for more than two years and desperate to prove that his career has not already peaked.
The World No 1 beat Japan's Kei Nishikori for his 63rd career title
Images from the matches played on Day 8 at the Australian Open at Melbourne Park on Tuesday
Thousands of athletes and staff roamed the Olympic village freely, mingling at cafes and swapping souvenir pins.
Defending champion Novak Djokovic defeated Belgium's Steve Darcis 6-0, 7-5 on Monday to power into the last 16 of the Miami Open.
His mere presence causes hysteria and pandemonium in the Land of the Rising Sun and he has no tennis equal in a continent heaving with 4.427 billion inhabitants, yet self-effacing Kei Nishikori thinks he is simply 'one' of the best players in Japan.
The British duo squandered two match points in a nerve-jangling second set tiebreak and looked to be heading out as the Belgians moved ahead in the third set, leading 9-7.
Nadal thrashes Nishikori; Federer downs Wawrinka
World No 1 Novak Djokovic had no explanation for his flat performance in a stunning semi-final loss to Japan's Kei Nishikori at the U.S. Open on Saturday.
Champion Novak Djokovic did not bother with a practice hit before his showdown with Kei Nishikori and his "less is more" approach paid off with an easy 6-3, 6-2, 6-4 win on Tuesday to set up a blockbuster Australian Open semi-final with Roger Federer.
Serbian tennis ace Novak Djokovic has continued his domination on an unchanged top 10 in the latest men's tennis rankings issued by the ATP on Monday.
PHOTOS from day four of the Wimbledon championships at the All England Lawn Tennis and Croquet Club in London on Friday.
The 30-year-old Serb had been scheduled to start the new season at an exhibition match in Abu Dhabi on Friday when an elbow injury flared up.
Home favourite Kei Nishikori defeated Frenchman Richard Gasquet 7-6(2), 6-1 in the semi-finals of the Japan Open on Saturday, setting up a final against Russian qualifier Daniil Medvedev.
Rafael Nadal's decision to end his season early means Cilic is actually holding the last berth for the eight-man showdown at London's O2 Arena.
Nadal no longer 'immovable' object in Paris.
World No 1 Novak Djokovicremained on course for his fifth title of the season after defeating 11th seed Milos Raonic in the quarter-finals of the Madrid Masters on Saturday.
Top seed Novak Djokovic overcame a strong challenge from Belgium's David Goffin to reach the Miami Open final with a 7-6(5), 6-4 victory on Friday as he continued his pursuit of a fifth title in six years on Key Biscayne.
Novak Djokovic sat out last year's U.S. Open to rest an elbow injury that eventually required surgery, but that pain and frustration felt like a distant memory on Friday when the Serb completed his march to the New York final with authority.
Eighteen time Grand Slam champion Roger Federer has climbed up to the fourth spot in the latest ATP rankings after lifting his third Miami Open title by beating long-time rival Rafael Nadal.
Swiss tennis maestro Roger Federer stepped up his bid for a record ninth Halle grasscourt title with a straight sets victory over Germany's Jan-Lennard Struff in the opening round on Wednesday.
The eight seeded South African fought back after losing the first two sets to defeat the Swiss ace 2-6, 6-7(5), 7-5, 6-4, 13-11.