Unseeded Zheng powered through the draw with several upset triumphs before finishing it off by defeating second seed Sabalenka.
“Five years ago was the first time I won my first WTA match here. Now I win my first WTA title - it’s just amazing,” Zheng said.
“I’m very excited about how I played here all week. It’s just been an amazing week for me.”
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Zheng prevailed on the back of a strong serve and converting all five of her break opportunities.
After Zheng took the first set, Sabalenka mounted a brief rally by winning three straight games to take a 3-2 lead but the world number 10 could not hold the advantage.
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