Iga Swiatek dominated American Jessica Pegula 6-1 6-0 to win the season-ending WTA Finals in Cancun on Monday and regain her world number one ranking from Aryna Sabalenka.
She broke Pegula´s serve five times and won the final 11 games in a 59-minute slaughter to capture her first WTA Finals title in a match delayed by a day due to rain.
"I want to thank my team who have been with me for the whole season," Swiatek said during the trophy ceremony.
Swiatek came into the tournament hot having won last month's China Open and never dropped a set over the course of her five matches at the event, which brings together the top eight players in the world.
She wil end the season on an 11-match winning streak and will finish the year in the top spot for the second year in a row, having lost the position to Sabalenka after the U.S. Open.
Swiatek, 22, collected six out of her total 17 career titles this season. She retained the French Open crown in June to lift her fourth Grand Slam trophy.