WTA

MELBOURNE, AUSTRALIA - JANUARY 18: Angelique Kerber of Germany was presented with a celebratory 30th birthday cake by Australian Open partner Lavazza thanks to pasticceria institution and Lavazza customer Brunetti during day four of the 2018 Australian Open at Melbourne Park on January 18, 2018 in Melbourne, Australia. (Photo by Vince Caligiuri/Getty Images)

Happy 30th Birthday to WTA star Angelique Kerber!

Eugenie Bouchard: winning start at 2018 Australian Open

Maria Sharapova making moves at the start of 2018 WTA Tour

Belinda Bencic knocks out Venus Williams, 2018 keeps getting better

SYDNEY, AUSTRALIA - JANUARY 13: Angelique Kerber of Germany poses with the winners trophy after the Women's Singles Final match against Ashleigh Barty of Australia during day seven of the 2018 Sydney International at Sydney Olympic Park Tennis Centre on January 13, 2018 in Sydney, Australia. (Photo by Mark Metcalfe/Getty Images)

Angelique Kerber wins Sydney, sets herself up for AusOpen

BRISBANE, AUSTRALIA - JANUARY 02: Garbine Muguruza of Spain is injured in her match against Aleksandra Krunic of Serbia during day three of the 2018 Brisbane International at Pat Rafter Arena on January 2, 2018 in Brisbane, Australia. (Photo by Bradley Kanaris/Getty Images)

Garbine Muguruza withdrawal places doubt on Australian Open run

MELBOURNE, AUSTRALIA - JANUARY 28: Serena Williams of the United States poses with the Daphne Akhurst Memorial Cup after winning the 2017 Women's Singles Australian Open Championship at Melbourne Park on January 28, 2017 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

Serena Williams: absence makes way for new Australian Open champion

HOBART, AUSTRALIA - JANUARY 07: Eugenie Bouchard of Canada plays tennis with Australian cricketer George Bailey during Day One of 2018 Hobart International match at Domain Tennis Centre on January 7, 2018 in Hobart, Australia. (Photo by Robert Cianflone/Getty Images)

Eugenie Bouchard: rocky start to 2018 WTA Tour at Hobart International

SYDNEY, AUSTRALIA - JANUARY 08: Angelique Kerber of Germany reacts winning a point in her first round match against Lucie Safarova of Czech Republic during day two of the 2018 Sydney International at Sydney Olympic Park Tennis Centre on January 8, 2018 in Sydney, Australia. (Photo by Zak Kaczmarek/Getty Images)

Angelique Kerber knocks out Venus Williams in Sydney

SYDNEY, AUSTRALIA - JANUARY 07: Kristina Mladenovic of France retires injured in her first round match against Ellen Perez of Australia during day one of the 2018 Sydney International at Sydney Olympic Park Tennis Centre on January 7, 2018 in Sydney, Australia. (Photo by Zak Kaczmarek/Getty Images)

Heat Affects First Round Play at Sydney International

AUCKLAND, NEW ZEALAND - JANUARY 07: Julia Gorges of Germany poses with the trophy following her Womens Singles Final win against Caroline Wozniaki of Denmark during day seven of the ASB Women's Classic at ASB Tennis Centre on January 7, 2018 in Auckland, New Zealand. (Photo by Phil Walter/Getty Images)

Julia Goerges defeats Caroline Wozniacki, wins in Auckland

PERTH, AUSTRALIA - JANUARY 05: Eugenie Bouchard of Canada receives medical assistance during her singles match against Elise Mertens of Belgium on day seven during the 2018 Hopman Cup at Perth Arena on January 5, 2018 in Perth, Australia. (Photo by Paul Kane/Getty Images)

Eugenie Bouchard: Hobart action will reveal health status

BRISBANE, AUSTRALIA - JANUARY 06: Elina Svitolina of Ukraine kisses the winners trophy after winning the WomenÕs Final match against Aliaksandra Sasnovich of Bulgaria during day seven of the 2018 Brisbane International at Pat Rafter Arena on January 6, 2018 in Brisbane, Australia. (Photo by Bradley Kanaris/Getty Images)

WTA Tour early wins: breaking down the best starts to 2018

PERTH, AUSTRALIA - JANUARY 06: Roger Federer and Belinda Bencic of Switzerland pose with the Hopman Cup trophy after defeating Alexander Zverev and Angelique Kerber of Germany in the final on day eight during the 2018 Hopman Cup at Perth Arena on January 6, 2018 in Perth, Australia. (Photo by Paul Kane/Getty Images)

Team Switzerland defeats Germany to win 2018 Hopman Cup

ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 30: Serena Williams of United States plays a forehand against Jelena Ostapenko of Latvia during Ladies Final match on day three of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 30, 2017 in Abu Dhabi, United Arab Emirates. (Photo by Tom Dulat/Getty Images)

Serena Williams to skip Australian Open, tournament wide open

BRISBANE, AUSTRALIA - JANUARY 04: Elina Svitolina of Ukraine celebrates a point in her match against Johanna Konta of Great Britain during day five of the 2018 Brisbane International at Pat Rafter Arena on January 4, 2018 in Brisbane, Australia. (Photo by Chris Hyde/Getty Images)

Elina Svitolina reaches Brisbane final, ousts Karolina Pliskova

SINGAPORE - OCTOBER 23: Simona Halep of Romania serves in her singles match against Caroline Garcia of France during day 2 of the BNP Paribas WTA Finals Singapore presented by SC Global at Singapore Sports Hub on October 23, 2017 in Singapore. (Photo by Matthew Stockman/Getty Images)

Simona Halep, Maria Sharapova reach semis at Shenzhen Open

PERTH, AUSTRALIA - JANUARY 03: Angelique Kerber and Alexander Zverev of Germany defeat Eugenie Bouchard and Vasek Pospisil of Canada in the mixed doubles match on Day Five of the 2018 Hopman Cup at Perth Arena on January 3, 2018 in Perth, Australia. (Photo by Will Russell/Getty Images)

Angelique Kerber, Germany best Canada at Hopman Cup

AUCKLAND, NEW ZEALAND - JANUARY 03: Caroline Wozniacki of Denmark acknowledges the fans after winning her match against Petra Martic of Croatia during day three of the ASB Women's Classic at ASB Tennis Centre on January 3, 2018 in Auckland, New Zealand. (Photo by Anthony Au-Yeung/Getty Images)

Caroline Wozniacki winning early at WTA Auckland Open

PERTH, AUSTRALIA - DECEMBER 31: Eugenie Bouchard of Canada serves to Daria Gavrilova of Australia in her singles match on day 2 of the 2018 Hopman Cup at Perth Arena on December 31, 2017 in Perth, Australia. (Photo by Paul Kane/Getty Images)

Eugenie Bouchard, team Canada need rebound win against Germany

PERTH, AUSTRALIA - JANUARY 02: Roger Federer and Belinda Bencic of Switzerland celebrate a point in the mixed doubles match against Anastasia Pavlyuchenkova and Karen Khachanov of Russia on Day Four of the 2018 Hopman Cup at Perth Arena on January 2, 2018 in Perth, Australia. (Photo by Paul Kane/Getty Images)

Hopman Cup 2018: Federer, Bencic sweep team Russia

BEIJING, CHINA - OCTOBER 03: (EDITORS NOTE: Image has been converted to black and white.) Maria Sharapova of Russia returns a shot against Ekaterina Makarova of Russia during the women's singles first round on day four of 2017 China Open at the China National Tennis Centre on October 3, 2017 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

Maria Sharapova survives test from Alison Riske at Shenzhen Open

ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 30: Jelena Ostapenko of Latvia plays a forehand against Serena Williams of United States during Ladies Final match on day three of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 30, 2017 in Abu Dhabi, United Arab Emirates. (Photo by Tom Dulat/Getty Images)

Jelena Ostapenko upset by Kristyna Pliskova at 2018 Shenzhen Open

BEIJING, CHINA - OCTOBER 04: Maria Sharapova of Russia returns a shot against Simona Halep of Romania during the Women's singles 3rd round on day five of 2017 China Open at the China National Tennis Centre on October 4, 2017 in Beijing, China. (Photo by Lintao Zhang/Getty Images)

Maria Sharapova cruises into Shenzhen Open second round

PERTH, AUSTRALIA - DECEMBER 31: Eugenie Bouchard and Vasek Pospisil of Canada talk tactics in their mixed doubles match against Daria Gavrilova and Thanasi Kokkinakis of Australia on day 2 of the 2018 Hopman Cup at Perth Arena on December 31, 2017 in Perth, Australia. (Photo by Paul Kane/Getty Images)

Eugenie Bouchard, team Canada struggle at Hopman Cup

SINGAPORE - OCTOBER 21: Simona Halep of Romania practices prior to the BNP Paribas WTA Finals Singapore presented by SC Global at Singapore Sports Hub on October 21, 2017 in Singapore. (Photo by Clive Brunskill/Getty Images)

Simona Halep opens against Nicole Gibbs in Shenzhen

BRISBANE, AUSTRALIA - DECEMBER 30: Garbine Muguruza of Spain plays a shot during a practice session at the 2018 Brisbane International at Pat Rafter Arena on December 30, 2017 in Brisbane, Australia. (Photo by Bradley Kanaris/Getty Images)

Garbine Muguruza can retake No. 1 ranking in Brisbane

ABU DHABI, UNITED ARAB EMIRATES - DECEMBER 30: Serena Williams of United States plays a forehand during her Ladies Final match against Jelena Ostapenko of Latvia on day three of the Mubadala World Tennis Championship at International Tennis Centre Zayed Sports City on December 30, 2017 in Abu Dhabi, United Arab Emirates. (Photo by Tom Dulat/Getty Images)

Serena Williams makes return to tennis in Abu Dhabi