The unseeded Ostapenko, 20, downed Romanian third seed Simona Halep 4-6, 6-4, 6-3 in the final, hitting a staggering 54 winners and taking her tournament tally to 299.
World No 1 Novak Djokovic ended Kei Nishikori's impressive debut at the ATP World Tour Finals with a 6-1, 3-6, 6-0 semi-final victory at the O2 Arena on Saturday.
India's Sania Mirza and her Swiss partner Martina Hingis continued their domination in the women's doubles by winning their sixth consecutive title by lifting the Brisbane International Tennis Tournament, in Brisbane, on Saturday.
Anyone banking on the ravages of time taking their toll on Roger Federer had better think again -- the Swiss is only getting better, according to his latest victim.
Belgium can not afford any mistakes against Ireland in their second Euro 2016 Group E match on Saturday.
Former World No 1 Caroline Wozniacki reached the quarter-finals of Eastbourne's Aegon Championships with a topsy-turvy defeat of Svetlana Kuznetsova on Wednesday.
South Africa will hope the new year brings about a change in luck as they seek to put behind them a disappointing 2015 and get back to winning ways against England in the second Test at Newlands starting on Saturday.
Nadal has turned back the clock to sweep through the European claycourt season with titles in Monte Carlo, Barcelona and Madrid and is a daunting obstacle for anyone with genuine title ambitions.
Struggling Premier League champions Chelsea have the quality to climb back up the table under interim manager Guus Hiddink, goalkeeper Thibaut Courtois has said.
Top seeds Sania Mirza and Martina Hingis went through several anxious moments before getting past Russian girls Daria Kasatkina and Alexandra Panova in their opening doubles match at the French Open on Wednesday. The reigning Wimbledon, US Open and Australian Open champions prevailed 7-6(4), 6-2.
Andy Murray stayed on course for a second Wimbledon title while setting setting up a semi-final showdown with Roger Federer.
IMAGES from Day 8 of the US Open on Monday
The 13th seeded Czech proved too strong for Serb, who lifted the Suzanne Lenglen Cup in 2008, winning 7-5, 6-4.
Stuns World No 1 Djokovic to win 'biggest title of career'
Jose Mourinho was far from happy after his Manchester United side failed to beat struggling HullCity at Old Trafford on Wednesday, walking out of one interview and claiming in another that he was treated differently from other managers.
Spain are experiencing their worst French Open campaign for almost 20 years despite having Rafael Nadal and David Ferrer through to the fourth round.
German Sabine Lisicki lived up to her status as the new Wimbledon favourite with a clinical 6-3m 6-3 demolition of Kaia Kanepi in the quarter-finals on Tuesday.
Defending French Open champion Maria Sharapova, on Wednesday, called for a change in schedule for the Fed Cup, saying playing ties after Grand Slam tournaments was "pointless".
Juergen Klopp expressed disappointment at the officiating and his Liverpool side's poor finishing in the second leg of their League Cup semi-final at Anfield on Wednesday after Southampton claimed a late 1-0 victory to book a spot in the final.
The top-seeded duo battled past the Rodionova sisters of Australia, Anastasia and Arina, 6-7, 6-3, 10-5 in their opening round match of the US $731,000 clay-court event.
'I feel like I'm rested enough. I've had... not the toughest matches. I can look at this quarter-final (on Wednesday against Milos Raonic) in a totally relaxed fashion'
Chelsea midfielder Cesc Fabregas has joined captain John Terry in backing manager Jose Mourinho after the Blues' abysmal start to their Premier League title defence.
The 30-year-old is the first German woman to win Wimbledon since Steffi Graf in 1996.
Kirsten Flipkens led India Aces to a tight one-point win over defending champions Singapore Slammers with her decisive victory over Kiki Bertens in the do-or-die women's singles clash in IPTL, in Tokyo on Saturday.
Tomas Berdych rebounded from an opening defeat to revive his hopes at the ATP World Tour Finals by demolishing Croatia's Marin Cilic at the O2 Arena on Wednesday.
Here is a factual guide on the man of the moment...
Tottenham Hotspur booked their place in the FA Cup semi-finals but an injury to Harry Kane marred the party as they marked their last tie at their White Hart Lane home with a 6-0 thrashing of third-tier London rivals Millwall on Sunday.
Roger Federer says he does not regret passing up the chance to topple great rival Rafael Nadal from the top of the world rankings at the ATP Finals in London this week.
South Africa have named fast bowler Dale Steyn in their 15-man squad for the World Twenty20 in India next month, but will ask him to prove his fitness following a debilitating shoulder injury.
'We were not lying yesterday when we said in the press conference Iran is a tough team'
Rediff.com takes you back to the five own goals scored at the ongoing FIFA World Cup...
Spain boss Vicente del Bosque is not expecting a repeat of their crushing 4-0 victory over Italy in the final four years ago when the two sides meet in the last 16 of Euro 2016 on Monday. Spain destroyed the Italians in one of the most one-sided finals in the competition's history at Euro 2012 to clinch their second consecutive European title and reaffirm their status as the world's then dominant side.
A diving header from Mario Mandzukic took a deflection off the Nigerian midfielder and crept into the goal for a deserved lead as Croatia dominated the count of chances created in the first 45 minutes.
Svetlana Kuznetsova had been steamrolled in the second set and was a break down in the decider of her WTA Finals opener against defending champion Agnieszka Radwanska on Monday. So what did the Russian do to turn the match around?
World number three Simona Halep refused to let illness beat her as she collected her ninth WTA Tour title by downing Timea Bacsinszky in the Shenzhen Open final on Saturday.
Pep Guardiola claimed his maiden English silverware as his side thrashed Arsenal 3-0 in the League Cup final with Sergio Aguero, Vincent Kompany and David Silva all on target in a disappointingly one-sided showpiece on Sunday.
Former South Africa skipper Bacher Ali believes that young black players cannot make it to the country's cricket if they continue to stay in the township culture.
India's tennis ace Sania Mirza and her Swiss partner Martina Hingis continued their stupendous run by clinching their 25th victory together to enter the final of the Brisbane International Tennis Tournament in Brisbane, on Friday.
England have the makings of a strong future test team, captain Alastair Cook said on Wednesday after a comprehensive 241-run win over South Africa in the first Test at Kingsmead.