Nishikori is the latest high-profile men's player to pull out of the season's first Grand Slam following the withdrawal of Briton Andy Murray on Saturday.
Lewis Hamilton was made to wait for his fifth Formula One world championship, on Sunday, after the Mercedes driver finished only third in a US Grand Prix won by Ferrari veteran Kimi Raikkonen.
Seven times world champion Michael Schumacher took his last win with Ferrari in China in 2006. He has not appeared in public since he suffered severe head injuries in a 2013 skiing accident.
Azarenka, 31, brought her an ice pack and a towel before helping the Russian qualifier, who burst into tears, to her chair where she received treatment.
Is Lewis Hamilton sufficiently appreciated at home?
Caleb Ewan claimed his second victory in this year's Tour de France when he prevailed in a tightly contested sprint to win the 11th stage,
The Dutchman won a maiden Formula One title after a last-lap overtake on Mercedes rival Lewis Hamilton in Abu Dhabi.
Venezuelan Vallverdu currently coaches three-time Grand Slam winner Stan Wawrinka who crushed former world number one Murray 6-1, 6-3, 6-2 in the opening round of this year's French Open.
Briton Adam Yates retained the overall leader's yellow jersey after staying tucked in the main peloton, which crossed the line with a deficit of 2:53.
'I've been practising the last few days and trying to manage it, but after playing some points today, I decided that it was not going to be good enough to play.'
Bottas said he was already looking forward to next season despite the fact there are still two races left on the current calendar.
Spaniard Carlos Sainz will make a dream move to Ferrari next year, with Australian Daniel Ricciardo replacing him at McLaren, as Formula One's driver carousel took another big twirl on Thursday with the 2020 season yet to start. Ferrari said 25-year-old Sainz, who replaces four times World champion Sebastian Vettel alongside young Monegasque Charles Leclerc at the sport's most glamorous team, had signed for 2021 and 2022.
Ferrari fans had mocked up a picture of Lewis Hamilton as a cry baby ahead of the Italian Grand Prix but the Mercedes driver was not the one shedding tears
Formula One said the task force would listen to a range of people, including drivers, to identify what needed to be done to improve diversity and opportunity.
The pole was a record-extending 82nd of Hamilton's career and his 10th of a season that has already seen the Briton clinch his fifth world championship.
Serena Williams, hoping to win a record-equalling 24th Grand Slam singles title, will start her campaign against fellow American Kristie Ahn.
After losing the first set, Konta faced three break points in an epic fifth game of the second when she came under enormous pressure.
Froome had been the favourite to retain his title but he paid the price for the efforts he made to win the Giro d'Italia in May as he just failed to become the first man in 20 years to achieve the Giro-Tour double.
Mick Schumacher is now expected to move up to Formula One with Red Bull's Honda-powered AlphaTauri team
Lewis Hamilton put no limits on what he could achieve after roaring past retired Ferrari great Michael Schumacher on Sunday as the Formula One driver with most wins in the history of the sport.
Team Ineos's Luke Rowe and Lotto Jumbo-Visma's Tony Martin were both kicked out of the race following an altercation, just under 14 kilometres from the finish.
Mithali Raj played a captain's knock to guide India Women to a consolation four-wicket win over England
'I do stand unified with them, trying to do what I can over here'
Lewis Hamilton can clinch his fifth Formula One world championship at Sunday's US Grand Prix.
Lewis Hamilton, winner of a record 94 races, said after winning Sunday's Turkish Grand Prix to clinch the title that he thought more of others.
Lewis Hamilton won the French Grand Prix on Sunday as Formula One champions Mercedes put on another show of dominance with their 10th victory in a row and 50th one-two finish.
Lewis Hamilton, who started on pole position in Sochi hoping for a 91st Formula One victory to equal Ferrari great Michael Schumacher's all-time record, finished third behind Red Bull's Max Verstappen.
Mercedes were summoned by stewards post-race for the infringement.
I am with my dream team, says Mercedes driver
Serena Williams showed glimpses of what lies in store for rivals this season
When it comes to diversity, swimming has a way to go.
Lewis Hamilton aims to stay in F1 for at least three more years
The pole was the 95th of Hamilton's career and seventh in nine races this season, continuing Mercedes' 100% record in qualifying.
Chris Froome showed again he will attack his rivals on every terrain as the Briton extended his overall lead in the Tour de France with a surprising move in Wednesday's 11th stage, which was won with panache by world champion Peter Sagan.
Tennis is like "riding a bike" for Federer, who is not worried about his game or starting with "really low" expectations, but is more interested to see how his knee reacts to the rigours of competitive tennis.
This is the first time that the towering Croatian has made the final of the Aus Open
The win burnished Murray's reputation as one of the world's leading doubles exponents,
Summary of sports events and persons who made news on Friday
Lewis Hamilton is planning to get plenty of rest over the next few days
Grigor Dimitrov and Borna Coric tested positive for COVID-19 while participating in Novak Djokovic's Adria Tour exhibition tournament