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Serena, Naomi Osaka and the most controversial US Open final in history

It has been called one of the most controversial matches in tennis history. But what is the real story behind the 2018 US Open women's singles final? Don Van Natta looks back at the match that sparked debate on and off the court.

AP Photo/Seth Wenig

Replay: Backstory -- Serena vs. The Umpire

Western & Southern Open

Nick Kyrgios blasts ref, smashes rackets in Cincy loss

In the end the record books will say Karen Khachanov beat Nick Kyrgios two sets to one in a second-round match in Cincinnati on Wednesday, but that tells virtually none of the actual story.

Despite loss, Andy Murray makes great strides in singles return

His game might be a bit rusty, but Andy Murray's on-court demeanor was in vintage form in a first-round loss at the Cincinnati Open.

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Western & Southern Open

Coco Vandeweghe grateful for return to tennis from rare pain condition

Coco Vandeweghe barely watched tennis after a rare condition sidelined her most of the year. Now, she's slowly getting back into the swing of things.

Cincinnati tourney is like coming home for Madison Keys

Having grown up in the Midwest, tennis star Madison Keys relishes the opportunity to return to play in Mason, Ohio, each year.

Tennis

Medvedev throws racket, then wins tournament

Daniil Medvedev throws his racket after losing a point, then goes on to win the next four points to finish off David Goffin.

1:27

Tennis

Keys beats Kuznetsova to win title

Madison Keys defeats Svetlana Kuznetsova in straight sets 7-5, 7-6 to win the Western & Southern Open.

0:57

Tennis

Serena vs. the umpire fantastic for tennis

Serena Williams' coach Patrick Mouratoglou admits that the controversy between Serena and the chair umpire drew fans to tennis.

0:33

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