It was his first victory ever against a player ranked in the top two and it avenged the semi-final loss at the Rio Olympics where Murray went on to win gold and Nishikori settled for bronze.
Andy Murray said on Thursday the noise created by the US Open's new retractable roof over Arthur Ashe Stadium is a distraction to players and makes it difficult to react to opponents' shots.
Andy Murray made another of his trademark stirring fightbacks as the third-seeded Scot powered past Frenchman Adrian Mannarino after dropping the first two sets of their second round encounter at a sweltering US Open in New York, on Thursday.
Britain's Andy Murray overcame a blistering start from Tomas Berdych to advance to his fourth Australian Open final with a 6-7(6), 6-0, 6-3, 7-5 victory on Thursday.
Briton's Andy Murray was awarded an OBE by the Duke of Cambridge, Prince William, at a ceremony at Buckingham Palace on Thursday.
Andy Murray, who put Britain on top of the tennis world with victory in the Davis Cup at the weekend, says he has given up talking to the Lawn Tennis Association (LTA) about the future of the game back home as it is a waste of time.
Matteo Berrettini won the Stuttgart Open for a second time after he beat Andy Murray 6-4, 5-7, 6-3 on Sunday to deny the Scot what would have been his first title on grass in six years.
World number two Andy Murray is reuniting with his former coach Ivan Lendl and the two will work together at Queen's Club on Monday, the Scot said in a statement.
World number two Andy Murray will not be working with Swede Jonas Bjorkman next year after his French coach Amelie Mauresmo resumed her role following the birth of her son.
Canadian Milos Raonic will not be the only man experiencing something new on Wimbledon's Centre Court on Sunday -- for the first time Britain's Andy Murray will start a Grand Slam final as favourite after crushing Tomas Berdych in the semis.
Amelie Mauresmo ended her coaching relationship with Andy Murray because she felt she could not improve the world number two any further, the former world number one said on Saturday.
Novak Djokovic produced a stunning performance to thrash Frances Tiafoe in his first match since winning Wimbledon in July to edge Team Europe ahead in the Laver Cup on Saturday.
The Scottish broadcaster said Murray was self-isolating and still had hopes of competing in the Australian Open next month.
World number one Andy Murray is against giving wild cards to players returning from doping bans but the 29-year-old understands why tournament organisers make an exception for "big names".
Japan's Kei Nishikori made a stunning start to what will surely be the first of many appearances at the ATP World Tour Finals with a 6-4, 6-4 win over home favourite Andy Murray on Sunday.
Zverev will have a chance to spoil the birthday party for Nadal, who turns 36 on Friday
Andy Murray will need to be at his streetwise best to beat Stan Wawrinka in the French Open semi-finals on Friday, three-times former Roland Garros champion Mats Wilander told Reuters.
Raducanu falls in first match since US Open triumph.
Second seed Andy Murray of Great Britian edged past Canadian Milos Raonic to set up a high-voltage final against World No. 1 Novak Djokovic at the Australian Open in Melbourne, on Friday.
Unheralded British youngster Kyle Edmund faces a Davis Cup baptism of fire when he makes his debut in the final on Friday against Belgium's David Goffin in the opening rubber.
Murray credits marriage for recent surge on clay
'You have to feel like the whole world working normally again and travelling normally before tennis would go back to especially the major competitions'
Britain's world number three Andy Murray has stressed the importance of gender equality in tennis, saying the work ethic required to succeed is the same for both men and women.
As the new World No 1, Andy Murray could be troubled by the weight of expectations on his shoulders at the ATP World Tour Finals, but the Briton just wants to enjoy his new status.
Andy Murray battled past Romanian qualifier Marius Copil 6-3, 6-7(7), 6-4 at the European Open in Antwerp on Friday to reach his first singles semi-final in two years.
Novak Djokovic beat Casper Ruud in the French Open final to win a men's record-extending 23rd Grand Slam title.
World No 1 Novak Djokovic continued his impressive run of form, winning the Miami Open over Andy Murray 7-6(3), 4-6, 6-0 at Key Biscayne on Sunday.
Andy Murray recovered from a slow start to beat Argentine qualifier Juan Ignacio Londero
Andy Murray said he hoped the players and their family members who tested positive recovered soon and added that the tournament should not have gone ahead in hindsight.
Wimbledon champion Andy Murray says he is unlikely to play in Britain's Davis Cup quarter-final clash in Serbia this weekend but could travel to Belgrade in support of the team.
Andy Murray would not have continued playing at the Australian Open if his father-in-law's health had deteriorated following his collapse at Rod Laver Arena, the world number two said on Monday.
Seven-time champion Federer faces last year's runner-up Milos Raonic in his quarter-final on Wednesday after defending champion Murray, who is chasing a third SW19 title, takes on big-serving American Sam Querrey for a place in the last four.
Andy Murray took another step towards securing a World Tour finals berth when he fought off a typically dogged David Ferrer to win 6-4, 7-5 and move into the final of the Valencia Open on Saturday.
Andy Murray has lost the world number two spot to Roger Federer in the latest ATP rankings released on Monday, after his defeat to Novak Djokovic in the Madrid Masters final.
Davis Cup hero Andy Murray won the BBC Sports Personality of the Year award for 2015 at a star-studded reception in Belfast on Sunday.
Four more performances like that at the O2 Arena this week should guarantee Andy Murray will end 2016 leading the pack.
Wimbledon's favourite son Roger Federer swapped his usual tennis whites for a dark suit and tie and was given a rousing standing ovation as he joined a number of Wimbledon champions dating back to the 1960s for Centre Court's centenary celebrations.
Last year, Andy Murray prevailed on four sets but the Briton has been struggling to find his A-game this season. Stan Wawrinka also believes he is playing better than a year ago.
Ugo Humbert had 90 minutes to fill before his delayed Wimbledon match against Casper Ruud on Wednesday but it still wasn't enough to pack properly as he turned up at Number Two Court missing a vital piece of equipment - a tennis racket.
Murray, playing in his first Davis Cup tie since 2016 and only five months after returning to the sport following career-saving hip surgery, clawed out a 6-7(7), 6-4, 7-6(5) victory