Serena Williams and Roger Federer each made it through the first round of the Australian Open on Monday, extending their winning streaks at Melbourne Park.

With hip pain forcing him to retire, Andy Murray's loss in round one of the Australian Open might have been the final Grand Slam match of his career.

A distraught Andy Murray delivered the surprising news of his impending retirement at a press conference Thursday.

For the first time in their careers, a net will be between these two tennis GOATs.

After a year full of perseverance, Serena Williams was voted AP Female Athlete of the Year for the fifth time.

Martina Navratilova sent out a tweet that many believed was transphobic.

Serena Williams returned to competition in 2018 after giving birth to her first child, and her experience has sparked a rule change that will affect all women tennis players coming back from pregnancy.

Serena Williams can wear her catsuit at tennis tournaments in 2019.

Venus Williams reportedly settled with the family involved in a 2017 fatal car crash in Florida last week.

Serena Williams explains in a GQ profile she experienced a 'trigger moment' at the US Open, where she argued with the chair umpire.

GQ cover stirs controversy despite attempts to acknowledge the designer's signature style.

Roger Federer believes that Serena Williams "should have walked away" from her U.S. Open outburst against umpire Carlos Ramos.

Four of the top five American women won't defend Team USA's title in Prague.

Wimbledon has announced a new tiebreak rule that would prevent long, marathon final sets.

Sloane Stephens feuded with Anastasia Pavlyuchenkova in the first round of the China Open, at one point saying "b---h tried to hit me" after a volley.

Naomi Osaka is happy she won her first ever Grand Slam at the 2018 U.S. Open, but the memory brings up some complicated feelings.

Serena Williams has withdrawn from the China Open, officially ending her 2018 season.

LeBron James views the Serena Williams controversy at the U.S. Open through the lens of his daughter, Zhuri.

Mohamed Lahyani had told Kyrgios in his second round match that "I want to help you...I’ve seen your matches; you’re great for the sport."

Serena Williams' husband, Alexis Ohanian, took the New York Times to task after they published a study saying men are penalized more than women in tennis.

A pair of online petitions supporting Serena Williams in her fight against sexism have gained more than 20,000 supporters following the controversial rulings that cost her in last week's U.S. Open final.

Chair umpire Carlos Ramos issued a code violation without incident during Davis Cup play on Sunday.

A New York Times report on Friday found that men have been penalized more than 1,500 times in the past two decades at Grand Slam events, while women have been fined just 535 times.

The spotlight is shining on Naomi Osaka, who shared secrets with Ellen before a date with reporters in Japan.

Naomi Osaka has reportedly agreed to an endorsement deal with Adidas that will be the richest in women's tennis.

Count U.S. Open men's champion Novak Djokovic among those who believe chair umpire Carlos Ramos went too far.

Umpires are reportedly considering boycotting Serena Williams matches as they fear the don't have the backing of the tennis world.

The International Tennis Federation stood by the chair umpire who issued three costly and highly controversial violations against Serena Williams.

Serena Williams' emotional U.S. Open outburst inspired some really racist editorial cartoons from Australia.

Both Martina Navratilova and Billie Jean King had commentary for Serena Williams' infamous outburst during the U.S. Open final on Saturday.

Novak Djokovic topped Juan Martin del Potro in straight sets to capture his third U.S. Open title and 14th Grand Slam title.

Serena Williams will forfeit part of her U.S. Open prize money following a heated argument with chair umpire Carlos Ramos.

American tennis icon Billie Jean King support Serena Williams after her U.S. Open meltdown.

You might not have known who Naomi Osaka was two weeks ago. But you'll probably know now.

Serena Williams says she'll use what happened at the U.S. Open to continue fighting for equality.

Serena Williams' outburst in the U.S. Open finals against Naomi Osaka was the talk of the tennis world.

Serena Williams' outburst mars U.S. Open finals.

20-year-old Naomi Osaka knocked off Serena Williams in straight sets on Saturday afternoon to win the U.S. Open, her first Grand Slam title.

Djokovic beats Nishikori in the semifinals and will play for a third U.S. Open title.

Rafael Nadal retires from U.S. Open semifinals against Juan Martin Del Potro.

Serena Williams is back in the U.S. Open finals just a year after facing serious health issues following the birth of her daughter, and her husband is so proud that he made a celebratory video.

Naomi Osaka grew up idolizing Serena Williams, Now she's playing the tennis legend in the U.S. Open final.

Serena Williams reached the U.S. Open final after blowing out Anastasia Sevastova 6-3, 6-0 in the semifinals.

Novak Djokovic overcomes heat, humidity and John Millman to book a spot in the U.S. Open semifinals.

Madison Keys beat Spain's Carla Suarez Navarro on Wednesday in her U.S. Open quarterfinal match.

Steve Kerr's pick to join the NBA? Tennis star Novak Djokovic.

Kei Nishikori and Naomi Osaka advance to the U.S. Open semifinals and make history along the way.

Rafael Nadal and Dominic Thiem had an epic quarterfinal match. Here are the stats from the almost five hour battle.

Rafael Nadal, looking gassed in a first-set sweep, won a grueling U.S. Open quarterfinal match over No. 9 seed Dominic Thiem.