Former world number ones Venus Williams and Ana Ivanovic endured a humbling start to the season after the top two seeds were dumped out of the Auckland Classic in the first round by unheralded opponents.
Following is a list of Serena Williams' 23 grand slam singles titles after the American surpassed Steffi Graf's professional era record with victory at the Australian Open on Saturday:
Rafael Nadal, with his troublesome left wrist improving every day, will be eyeing more progress at the US Open on Friday when he bids for a place in the last 16.
Rafael Nadal will have his work cut out when play begins next week, not on the Caja Magica's three red dust courts, but on gaming consoles.
Johnson to meet Medvedev in Winston-Salem final
The 28-year-old said beating American great Williams was the finest win of her career, outstripping her upset of world number one Ash Barty at last year's US Open.
Pliskova, a finalist at last year's US Open who reached the semi-finals at Indian Wells last week, relied on her booming groundstrokes and strong returning to dispatch her American opponent in 59 minutes.
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.
Caroline Wozniacki put a huge dent in Maria Sharapova's bid to finish the season as world number one by overcoming some distracting bright lights to down the Russian 7-6(4), 6-7(5), 6-2 in their marathon opening group match of the WTA Finals on Tuesday.
Photos from Day 1 of the Australian Open matches played at Melbourne Park on Monday
Romania's Simona Halep pulled out of her final warm-up event before the Australian Open on Tuesday, saying she was suffering from gastroenteritis.
The volatile 17th seed had a quiet evening by his standards in his opening match on Monday, with just the one violation for unsportsmanlike behaviour when he asked spectator, in no uncertain terms, to be quiet while he was serving.
The exodus of seeded players has been so spectacular that only one of the top 10 remains -- number seven Karolina Pliskova.
Following is a list of American Serena Williams' 22 grand slam singles titles as she equalled Steffi Graf's professional era record with victory at Wimbledon on Saturday
World number two and top seed Caroline Wozniacki, runner-up at the south coast event last year, cruised into the semi-finals with a 6-4, 6-3 win over Australia's Ashleigh Barty.
Tactical change helps Halep to French Open semis
It wasn't just the tennis that amazed audiences at Roland Garros.
Maria Sharapova suffered a shock 7-6(4), 6-3 defeat to compatriot and wildcard Daria Gavrilova.
Simona Halep was able to shake off the disappointment of a third consecutive early exit from the WTA Finals by focusing on a positive year that led to the 26-year-old old Romanian climbing to the top of the world rankings.
Women's tennis's biggest names still remaining at the US Open take centre stage on Sunday with Grand Slam winners Maria Sharapova, Venus Williams, Garbine Muguruza and Petra Kvitova all appearing on Arthur Ashe Stadium.
Wozniacki said tournament staff and security did nothing to prevent the abuse
Sloane Stephens ground down unseeded German Julia Goerges 7-5, 6-2 to win the Auckland Classic on Saturday, the American ending a busy day at the office with a confidence-boosting triumph ahead of the Australian Open.
Raonic advances, Sock ousted in Rogers Cup
Karolina Pliskova gave herself the perfect pre-Wimbledon tonic by lifting the Aegon International title on the grass at Eastbourne.
Hong Kong's first WTA tennis tournament in more than 20 years suffered a major blow on Sunday with main drawcard Eugenie Bouchard withdrawing on medical advice after suffering from the heat at the U.S. Open.
Warne, Ponting, Langer to play Twenty20 bushfire match; Serena donates Auckland winnings to help raise money.
He leads the men's seedings ahead of defending champ Roger Federer, with Bulgarian Grigor Dimitrov seeded third.
Former Wimbledon runner-up Eugenie Bouchard successfully negotiated the qualifying draw on Thursday, beating Colombian Mariana Duque-Marino 6-3, 6-2 to secure a spot in next week's main draw.
Men's top seed Novak Djokovic and women's number two Angelique Kerber look to book berths in the last four of the US Open as the quarter-finals of the year's last Grand Slam get underway on Tuesday.
Swiss tennis star Martina Hingis has said that Li Na's retirement was a loss to world tennis, while also crediting the Chinese ace of raising the game's profile in her home country and across Asia.
A self-confessed tennis fan, former Indian cricket captain Sunil Gavaskar has bought stake in the the Singapore franchise of veteran Mahesh Bhupathi's ambitious brainchild -- the International Premier Tennis League.
Tennis star Maria Sharapova again tops the list of highest earning female athletes over the past year, according to Forbes.
The Danish World No 3 ended 2017 with the biggest title of her career in Singapore and returned a day after thrashing Madison Brengle in her season opener to hit 21 winners against eight unforced errors in the 53-minute win over Martic.
World number one Simona Halep pulled out of next week's WTA Finals due to a lower back injury.
Rediff.com presents matches that shook up US Open.
Czech second seed Karolina Pliskova avenged her Australian Open quarter-final loss to Mirjana Lucic-Baroni with a 6-3, 6-4 win over the 26th-seeded Croatian to secure a spot in the Miami Open semi-finals on Tuesday.
Former American great Chris Evert has no issue with tournaments handing Maria Sharapova wildcard entries as the Russian former world number one makes her way back from a doping ban, she said on Wednesday.
Eugenie Bouchard arrives in Eastbourne, her final grass-court warm-up, having lost nine of her last 10 matches.
Denis Shapovalov may not be old enough to drink in New York but is quickly becoming the toast of the Big Apple and the 18-year-old Canadian will again have a chance to light up the U.S. Open when he takes on Briton Kyle Edmund.
IMAGES from the PNB Paribas Open played at Indian Wells in California on Monday