Venus Williams also went the distance before claiming a 2-6, 6-3, 6-3 victory over Croatia's Donna Vekic.
Svitolina arrived in Singapore out of form yet determined to "silence the haters", who she said believed she did not deserve to be in the tournament, and the Ukrainian has played brilliantly to win all three pool matches and her semi-final.
World Number one Simona Halep and Japan's Naomi Osaka are among the players nominated for the Women's Tennis Association (WTA) Player of the Year award.
Serena Williams has given birth to a baby girl, the first child for the former world number one tennis player, her coach Patrick Mouratoglou said on Twitter on Friday.
The 17th seed has been in no-nonsense mood so far in Melbourne, moving through the rounds with the minimum of fanfare, but faces her biggest test against the German.
'Take care of yourself and see you back winning soon!'
The exodus of seeded players has been so spectacular that only one of the top 10 remains -- number seven Karolina Pliskova.
Madison Keys believes she is the perfect example that nice people can win.
Medvedev squandered a two-set lead against Nadal in their previous meeting in the Melbourne final in January, allowing the Spaniard to clinch his 21st Grand Slam title.
IMAGES from the US Open matches played on Day 1 at the Flushing Meadows in New York on Monday.
And, since, pictures speak more than words, Rediff.com brings you images from these sporting events and others that made headlines in the week gone by.
Three-times winner Serena Williams moved into the Toronto Open second round after beating Spain's Nuria Parrizas Diaz on Monday
Not many would have bet on unseeded Americans Danielle Collins and Frances Tiafoe making it to the Australian Open quarter-final
On a day when top seed Sloane Stephens survived a scare before beating Ajla Tomljanovic 4-6, 6-4, 6-4, Sakkari showcased supreme court coverage skills throughout her almost two-hour match against Bertens.
He leads the men's seedings ahead of defending champ Roger Federer, with Bulgarian Grigor Dimitrov seeded third.
IMAGES from Day 6 of the French Open at Roland Garros in Paris on Friday.
Madison Keys arrived in New York with the dream of making a return trip to the U.S. Open final but her goal crumbled in such stunning fashion on Thursday that she may suffer nightmares for some considerable time to come.
Naomi Osaka has witnessed a huge change in her career after claiming a maiden Grand Slam title in 2018, but the rising star of women's tennis will not be changing her quirky personality in media appearances that has endeared her to so many.
Kenin, Andreescu to be part of team event in Charleston in June
Russian youngster Daria Kasatkina's stirring run to the French Open quarter-finals left her temporarily homeless in Paris on Monday.
Russia's Anastasia Pavlyuchenkova stands on the threshold of finally delivering the title long predicted
The 37-year-old has enjoyed a renaissance season that has seen her reach the Australian Open and Wimbledon finals and sit just one victory away, against American compatriot Sloane Stephens, from playing for the US Open title for the first time since 2002.
Roger Federer, Rafa Nadal and Novak Djokovic have won the last 11 Grand Slams between them and an incredible 54 since 2003.
Florida-born Collins battled hard in the first set on a stifling day at Rod Laver Arena but ended up steamrolled 7-6(2), 6-0 by eighth seed Kvitova.
Newly-crowned French Open champion Simon Halep said she was inspired to win her first Grand Slam title by her manager Virginia Ruzici's feats 40 years ago at Roland Garros.
World No 1 Serena Williams overcame a dreadful second set to beat Germany's Sabine Lisicki.
IMAGES from the PNB Paribas Open played at Indian Wells in California on Monday
World number one Simona Halep pulled out of next week's WTA Finals due to a lower back injury.
Italian Camila Giorgi has now beaten the Australian Open champion in each of their three hardcourt meetings.
Coco Vandeweghe thrives on team play and said on Wednesday she hopes to cap a breakthrough season by leading the United States to victory over Belarus in this weekend's Fed Cup final.
Images from Day 2 of the 2022 Australian Open in Melbourne on Tuesday.
Images from Day 1 of the Wimbledon tennis championships in London, on Monday.
John Isner delved deep into his energy tank to outlast Germany's Alexander Zverev 6-7(4), 6-4, 6-4 and claim the biggest title of his career at the Miami Open.
Despite a slight waver following her win over Venus Williams, Cori Gauff has taken the attention in her stride so far at the All England Club.
Rafael Nadal won a record 34th ATP Masters 1000 title with a 6-0, 4-6, 6-1 victory over Novak Djokovic in the Italian Open final on Sunday.
Novak Djokovic, Rafael Nadal and Johanna Konta progressed to the Italian Open semi-finals on Friday, but Roger Federer and Naomi Osaka were forced to withdraw with injury problems. World number one Osaka pulled out of her quarter-final meeting with Kiki Bertens due to a thumb injury before 37-year-old Federer announced his withdrawal because of a problem to his right leg.
IMAGES of the all the action from Day 1 of the Australian Open played at Melbourne Park on Monday
Spain's Carla Suarez Navarro came back from a dreadful first set to defeat Venus Williams.
Summary of sports events and persons who made news on Tuesday
Greek teenager Stefanos Tsitsipas slayed another tennis giant on Saturday, saving a match point as he toppled big-serving Kevin Anderson 6-7(4), 6-4, 7-6(7) in a thriller to set up a Rogers Cup final against top seed Rafael Nadal.