The journey of Novak Djokovic and Nick Kyrgios as a doubles pair ended with a thrilling defeat by top seeds Nikola Mektic and Michael Venus.
Djokovic tamed local favourite Rinky Hijikata 6-3, 6-3 in what was the top seeded Serbian's first tour-level singles match since October.
Aryna Sabalenka took a step closer to a first trophy of the year before her Australian Open title defence begins later this month.
Novak Djokovic and Nick Kyrgios enthralled fans on their debut as a doubles team on Monday
Rafa Nadal returned to action for the first time since January at the Brisbane International on Sunday, losing his doubles match but overall showing no obvious after-effects of the hip injury that ruined his year.
Rafael Nadal continued his impressive return from a long injury layoff with a 6-1 6-2 demolition of wildcard Jason Kubler to reach the quarter-finals at the Brisbane International on Thursday ahead of this month's Australian Open.
Naomi Osaka felt the nerves but looked solid on her return to elite tennis after 15 months out as she got past Germany's Tamara Korpatsch 6-3 7-6(9) in the first round of the Brisbane International.
Rafael Nadal looked razor sharp again during his latest meeting with qualifier Thiem
Coco Gauff battled past Elina Svitolina in the Auckland Classic final on Sunday to retain her title.
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.
David Ferrer sent local favourite Bernard Tomic packing with an easy 6-3, 7-5 win in the opening round of the Brisbane International on Monday.
Victoria Azarenka thinks her rivalry with Serena Williams is making her a better player and is looking forward to renewing it over the next four weeks at the Brisbane International and the Australian Open.
The hosts had blanked Germany in their opening tie and became the first to seal a quarter-final spot with their second 3-0 win in the inaugural team event.
Andy Murray narrowly avoided the wrath of coach Ivan Lendl after labouring to a 6-1, 5-7, 6-3 win over Australian qualifier John Millman in his opening match at the Brisbane International on Thursday.
A ruthless Andy Murray powered his way to a 6-1, 6-3 win over injury-hampered Alexandr Dolgopolov to win the Brisbane International and take a timely shot of confidence ahead of the Australian Open.
American Andy Roddick survived a determined fight back from defending champion Radek Stepanek to win the Brisbane International final on Sunday.
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.
Novak Djokovic's preparations for the defence of his Australian Open title suffered an unexpected setback on Tuesday when the Serb was knocked out of the Brisbane International in the first round. The 21-year-old world number three lost his debut match at the brand new Pat Rafter Arena to former training partner Ernests Gulbis of Latvia 6-4, 6-4.
Bulgaria's Grigor Dimitrov upset top seed and defending champion Milos Raonic of Canada at the Brisbane International on Saturday to set up a title clash against Japan's Kei Nishikori.
An inspired Milos Raonic toppled Roger Federer 6-4, 6-4 to win the Brisbane International on Sunday and avenge his defeat to the Swiss master in last year's final.
The decibel readings were not needed for Victoria Azarenka on Monday as the groans from the crowd at the Brisbane International almost drowned out her trademark shrieks.
Rafael Nadal and Novak Djokovic won their matches for their respective countries on Day 4 of the ATP Cup on Monday.
Roger Federer will start his 2014 campaign at the Brisbane International next January, underlining the tournament's status as the biggest of the Australian Open warm-ups.
Nick Kyrgios eased past John Isner 7-5, 7-6(5), 7-6(5) in a duel of big servers to fire Australia to a 2-0 lead over the United States in their Davis Cup quarter-final in Brisbane on Friday.
Damian Torrie held up a sign and yelled out "Marry me Maria Sharapova?" during her first match, which encouraged a chorus of laughs around Pat Rafter Arena, News.com.au reported.
Maria Sharapova made a powerful start to the new tennis season on Tuesday, crushing Kazakhstan's Yaroslava Shvedova 6-0, 6-1 at the Brisbane International on Tuesday.
Serena Williams is chasing Australian Margaret Court's record 24 Grand Slam singles titles
Japan's Kei Nishikori and Victoria Azarenka of Belarus continued their Australian Open preparations by swiftly marching through to the quarter finals of the Brisbane International on Wednesday.
Apostolos immediately got up from his chair in shock and went up to the stands to sit with the rest of the Greek team while Tsitsipas, who was docked a point and warned by the umpire, received an earful from his mother Julia Apostoli.
World number one Rafael Nadal won a battle of attrition against fellow left-hander Yoshihito Nishioka of Japan 7-6(4), 6-4 to seal Spain's spot in the final eight of the inaugural ATP Cup in Perth on Wednesday. Meanwhile his long-time rival, world number two Novak Djokovic, had an easier outing in Brisbane, strolling past Chile's Cristian Garin 6-3, 6-3 to stay undefeated in the new year.
Czech Karolina Pliskova crushed Frenchwoman Alize Cornet 6-0, 6-3 with a barrage of winners to win the Brisbane International title on Saturday and signal her intent for this month's Australian Open.
Barty had some trouble in the first set against the two-time Australian Open champion and saved three break points at 5-5 to go on to win 7-6(2), 6-3 and level the tie at 1-1.
With only two weeks to go for the Australian Open, tennis stars Roger Federer, Victoria Azarenka, Radek Stepanek and Garbine Muguruza were seen in a light-spirited mood in Brisbane. As part of Nickelodeon Kids Day, the tennis stars led by 17-time Grand Slam winner Roger Federer posed for pictures with cartoon characters.
Maria Sharapova beat Ana Ivanovic in the final of the Brisbane International on Saturday in a display that bodes well for her chances at the Australian Open.
Switzerland's two greatest tennis players will join forces at next year's Rio Olympics when Roger Federer and Martina Hingis play together in the mixed doubles.
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.
Home hope Bernard Tomic continued his promising form ahead of the Australian Open by overcoming Kei Nishikori to set up a Brisbane International semi-final against big-serving Canadian Milos Raonic.
Roger Federer moved to within one win of his 1,000 career victory when he crushed Bulgaria's Grigor Dimitrov on Saturday to reach the final of the Brisbane International.
Defending champion Roger Federer will meet big-serving Canadian Milos Raonic in the final of the Brisbane International after the Swiss top seed dismantled rising Austrian talent Dominic Thiem 6-1, 6-4 in Brisbane.
Defending champion Federer, battling a flu bug according to the local media, was made to work hard by his Bulgarian opponent before the Swiss master prevailed 6-4, 6-7(4), 6-4 at the Pat Rafter Arena. "It was tough. Grigor's a great shotmaker, the future's ahead of him in the game," Federer said after setting up a semi-final against Austrian youngster Dominic Thiem.