The 6-2, 2-6, 6-3 win at the Pat Rafter arena was the 25-year-old's first in four attempts against world number five Nishikori and will boost his confidence ahead of the Australian Open, which starts on January 16 in Melbourne.
Leander Paes and Lukas Dlouhy had to be content with a runner-up finish at the ATP Brisbane International event after the top seeded duo lost the summit clash to Marc Gicquel and Jeremy Chardy in straight sets.
Tickets for Sydney ODI, Canberra T20I of India's white-ball tour of Australia sold out: CA
Kim Clijsters and Justine Henin were forced to draw on their vast experience to avoid being eliminated from the Brisbane International on Thursday. The two Belgians, both back on the professional circuit after retiring from the sport, scraped through their quarter-finals to remain on course for a possible showdown in Saturday's final.
US Open champion Kim Clijsters began her 2010 season with a comfortable 6-2, 6-1 victory over Italian Tathiana Garbin in the first round of the Brisbane International on Sunday.
Argentine Juan del Potro has withdrawn from next week's Brisbane International due to a persistent left wrist injury, tournament officials announced on Thursday.
Serbia's Novak Djokovic will launch his Australian Open defence at next year's Brisbane International, a new event that has been added to the tennis calendar.
A merciless Andy Murray subjected Australia's Bernard Tomic to a 6-3, 6-2 thrashing on Saturday to deflate local fans and set up an intriguing final with Alexandr Dolgopolov at the Brisbane International.
Amelie Mauresmo and her French compatriot Jo-Wilfried Tsonga both fought back from the brink of defeat to reach the quarter-finals of the Brisbane International on Wednesday.
Nadal expresses doubt over Australian Open participation
Maria Sharapova and Serena Williams will be fit to play at the Brisbane International, which begins this weekend, after injury scares, organisers said on Thursday.
Top seed Robin Soderling underlined his credentials as an Australian Open contender by overpowering defending champion Andy Roddick 6-3, 7-5 to win the Brisbane International on Sunday.
The India skipper will be eyeing the great Don Bradman's 88-year-old record for most runs by a captain in a Test series.
Defending champion Andy Roddick weathered an early onslaught from hard-hitting Ukrainian Alexandr Dolgopolov before steamrolling him 6-4 6-1 to book a quarter-final place at the Brisbane International on Wednesday.
Roger Federer took 55 minutes to dispel all injury doubts with a 6-2, 6-1 routing of unheralded German Tobias Kamke in the second round of the Brisbane International on Thursday. Media speculations swirled around the fitness of the world number three less than two weeks before he launches his bid for a fifth Australian Open title and the Swiss maestro dismissed them by dropping only three games in a lop-sided contest. "I'm going to do my best to stay injury free and give myself a chance to win another grand slam," Federer said after setting up a quarter-final against Grigor Dimitrov.
Naomi Osaka's return a boost for women's tour, says Mouratoglou
Indian delegation meets IOC officials for dialogue on hosting future Olympics
American Andy Roddick survived a determined fight back from defending champion Radek Stepanek to win the Brisbane International final on Sunday.
Justine Henin and Kim Clijsters steamrolled their semi-final opponents on Friday to set up a tantalising all-Belgian final at the Brisbane International. Henin, playing her first tournament in 20 months after coming out of retirement, crushed Serbia's Ana Ivanovic 6-3, 6-2 in a little over then hour. Then Clijsters, who won last year's US Open after making her own fairytale comeback, demolished Germany's Andrea Petkovic 6-4, 6-2.
Belgium's US Open champion Kim Clijsters showed no mercy against her childhood friend Alicia Molik at the Brisbane International on Tuesday, whipping the Australian 6-0, 6-3 to cruise into the third round.
The honorary consulate of India in Brisbane was forced to close down on Wednesday due to safety concerns after Khalistan supporters organised an unauthorised gathering and blocked the entry of the office, days after Australian Prime Minister Anthony Albanese assured India that his government will not tolerate "extreme actions."
Ever dissatisfied World No 1 Victoria Azarenka began her build-up to the Australian Open with an imposing 6-3, 6-3 victory over big-serving Sabine Lisicki in the Brisbane International second round on Wednesday.
Victoria Azarenka displayed the kind of form that could lead her to a hat-trick of Australian Open titles later this month by brushing aside German fourth seed Angelique Kerber 6-3, 6-1 in the Brisbane International final on Saturday.
Sania Mirza and her partner Bethanie Mattek-Sands had a superb start to the season as they lifted the WTA Brisbane International trophy.
Kim Clijsters survived two match points before winning her eagerly awaited rematch with fellow Belgian Justine Henin 6-3, 4-6, 7-6 in the final of the Brisbane International on Saturday.
Roger Federer and Serena Williams had contrasting 2013 seasons but both kick off their new campaigns at the Brisbane International this week showing no signs just yet of calling time on their illustrious careers.
Cricket Australia (CA), on its part, too said Kuhnemann is now free to continue playing international cricket.
India's 2036 Oly dream: IOC pauses bidding process to figure out 'appropriate' time to elect host
Rafael Nadal beat Alexandr Dolgopolov 6-3 6-3 in the Brisbane International first round on Tuesday to make a successful return to action following two-and-a-half months out due to injury. The Spanish former world number one, seeded fifth, made a sluggish start and fell 3-1 down in the first set against his Ukrainian opponent. But Nadal, 30, won four successive games to clinch the opening set and the 14-times grand slam winner broke twice in the second to see off 2012 Brisbane finalist Dolgopolov in one hour 15 minutes. He will next play Germany's Mischa Zverev.
Shubman Gill had a phenomenal Test series against England, leading a young Indian side in transition to a 2-2 draw and earning the Player of the Series award.
Sai Sudharsan spoke on how Tamil Nadu team-mate Washington Sundar has been an 'inspiration' for him, motivating him to rise up the ranks and break into the Indian team.
Fourteen-time Grand Slam champion Rafael Nadal crashed out of the Brisbane International after going down at the hands of top-seed Milos Raonic of Canada in their quarter-final clash here on Friday. World number three Raonic recorded only his second victory over Nadal in eight meetings with a 4-6, 6-3, 6-4 win in the last-eight contest that lasted two hours and 21 minutes.
Roger Federer, who will be chasing an 18th Grand Slam title at the Australian Open later this month, breezed through to the Brisbane International men's semi-finals with a 6-1, 6-1 thumping of Australian Marinko Matosevic.
The incident comes following the vandalism of three Hindu temples in Australia by Khalistani supporters.
Coco Gauff battled past Elina Svitolina in the Auckland Classic final on Sunday to retain her title.
Singapore-born Tim David, whose ball-striking prowess has made him a sought-after player in Twenty20 leagues across the world, has impressed since his Australia debut against India last month.
Three contenders for the women's singles title at the Australian Open.
The 38-year-old was brief while announcing that Wednesday marked his last day as an international cricketer.
'I believe I'm in a different moment, in a separate situation and in an unexplored terrain.'
The Indian team will tour Australia later this year for a multi-format limited overs series comprising three ODIs and five T20 Internationals.