This article originally appeared on Popularmechanics.com.

In the 2004 US Open tennis quarterfinals, Serena Williams couldn’t catch a break against Jennifer Capriati. Faced with a comedy of linesman and chair umpire errors, the world’s best player looked on as one bad call after another went against her, swinging the match in Capriati’s favor. The decisions were so egregious that US Open officials dismissed the chair umpire from the remainder of the tournament and apologized to Williams for the calls. But an even more significant development in the aftermath of the match was the increased pressure to introduce technology into the game that would assist in line calls; a shift which would change the game.
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