Jessica Pegula beat US Open champion Coco Gauff 6-2 6-1 to reach the title match at the WTA Finals in Cancún, Mexico, where she will next face either world number one Aryna Sabalenka or Iga Świątek.
In the first all-American semi-final at the WTA Finals since the reintroduction of the round-robin format in 2003, Pegula converted six of her 10 break point chances and lost serve just once during the 60-minute encounter.
Pegula broke at love to open the match and attacked her good friend Gauff’s serve twice more for a 5-2 lead en route to taking the first set in comfortable fashion.
In the second set, Pegula again started with a break to love and consolidated for a 2-0 lead before rain halted play for 14 minutes, an interruption during which the wind destroyed the umbrella Gauff was holding over her head.
When play resumed, Pegula remained in control as she added another break to open a 4-1 lead before rain again interrupted play, this time for 13 minutes.
Gauff tried to make the necessary adjustments but Pegula was rock solid at the baseline and sealed the win on her second match point to reach the biggest final of her career.
In the other semi-final, Poland’s Świątek will face Belarusian Sabalenka in a match that could decide the year-end world number one ranking.
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If Sabalenka wins, she will finish the year as world number one while world number two Świątek would need to win the title to retake top spot from the Belarusian.