The Spaniard recovered from a second-set blip to record an otherwise dominant 6-0 2-6 6-0 victory in the decider in Seoul on Sunday, ending her long wait for a Tour success.
Arruabarrena ends title drought in Seoul
Lara Arruabarrena claimed her first WTA Tour title in more than four years with a three-set win over Monica Niculescu in the Korea Open final.
It marked her second career WTA title and first since February 2012, when she claimed the crown in Bogota.
For Niculescu, she remains without a title since her success in Guangzhou in September 2014.
After a lengthy opening two games, Arruabarrena ran away with the opening set thanks to three breaks of serve.
Niculescu steadied in the second, however, a break for 3-1 setting her up to level the match.
Arruabarrena broke twice to start the deciding set and she cruised from then on.
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