(CNN) — Alyssa Thomas made history on Friday night as the Phoenix Mercury defeated the reigning champion New York Liberty 79-73 to progress to the WNBA playoff semifinals.

The six-time All-Star put up the first 20-point triple-double in WNBA postseason history, adding 11 rebounds and 11 assists in a dominant performance.

It was the fifth playoff triple-double of Thomas’ career, and just the seventh by any player in the league’s history. She now has nine for the season, more than double the total any other player has managed across their entire WNBA career.

“Is that AT’s first triple-double of the year?” joked Mercury head coach Nate Tibbetts after the game. “This is just what she does. She impacts the game in so many different ways. She cares about one thing, and that’s winning.

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