The events of the 2018 US Open final have been rehashed to death over the past year, so a documentary about them could be seen as overkill by close followers of tennis.

However, ESPN's Backstory: "Serena vs. The Umpire" debuted on ABC on Sunday. And in it, reporter Don Van Natta Jr. brings to light quite a bit of context that helps viewers better understand the texture of the conflict between Serena Williams and chair umpire Carlos Ramos.

Here are five things we learned from it:

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1

Commercial-break footage from after the coaching violation shows Williams attempting to get the initial warning removed.

"I wanna be clear: I have never gotten a coaching violation because I don't do it," Williams says.

Ramos: I understand that.

Williams: That's not something I do.

Ramos: I know that, too.

Williams: I can understand why you may have thought that, but just know I've never cheated.

Ramos: I understand your reaction as well.

Williams: Okay, thank you, because I'm like, I don't cheat.

Ramos: And I know that.

Williams: Yeah, so thank you so much.

This could explain why Williams seemed shocked to receive a point penalty after the racquet break later on, which counted as her second violation.

2

There were experiential reasons why Williams saw the coaching violation as a personal attack.

"I understood that it was so much more than that moment," author Roxane Gay said in the film. "I felt like it was a career of having to defend herself."

The Undefeated columnist Clinton Yates put it: "If you've been in scenarios in which, as a black person in America, you feel your identity is being confronted and taken from you ... there is a flight-or-fight reaction that forces you to behave in a way that sometimes people don't recognize as reasonable."

"She felt humiliated because she felt like he was saying that she was cheating," said Patrick Mouratoglou, Williams' coach. "And it's the worst thing you can say to Serena. She prefers to lose 100 times than people to think that she's cheating."

3

During a commercial break after the racquet-smash point penalty, Williams jawed at Ramos without being assessed another violation right away.

"You will never ever, ever be on another court of mine as long as you live," Williams said as part of a rant that wasn't captured as part of the live broadcast. "You are the liar."

4

Van Natta reports that: "After the match, Serena sought out Ramos in the referee's lounge, and they talked behind closed doors for several minutes."

"Two sources told me Serena told Ramos she respected him as an umpire but she did not agree with his calls," Van Natta said. "Ramos told Serena, 'I have nothing against you personally, and I was just doing my job.'"

5

Umpires tend to be more lenient toward male players.

An investigation by Amy Lundy for ESPN showed that, although men get penalized more than women, men only get called on about 35 percent of potential violations, while women get code violations 45 percent of the time. Specifically, John Isner was given only a soft warning for coaching during the same US Open.

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"Serena vs. The Umpire" has upcoming airings on ESPN News and ESPN2, and can be streamed on ESPN3.