Halep benefited from a large contingent of Romanian compatriots, who constantly cheered "Si-mon-a" from the stands.
"It's really nice to hear your name during the changeover," Halep said. "It's amazing that they can come to support me. I see the love, you know."
Halep also won in Shenzhen, China, last month, and this marked her second Premier 5 title, the highest level of
Pliskova was playing this week at a career-high ranking of No. 18. Next week the Czech will move up to No. 12.
"I still can't imagine myself, I'm 12 in the ranking," Pliskova said. "I just hope I'm going to start to feel like I belong there."
Despite the loss, Pliskova added five aces to her yearly tally. She has a tour-leading 149 in a tour-leading 22 matches.
Top-seeded Nadal played until 3:18 in the morning on Saturday before beating No. 6
Nadal will have only about 16 hours to recover before facing No. 4
In an early semifinal Saturday in the ATP-WTA event, No. 6 Anna Schmiedlova of Slovakia defeated No. 2
The seventh-seeded Monfils, who also beat the Spaniard in the second round last week in Rotterdam, put Bautista Agut under pressure with excellent return games, and converted four of his five break points to produce an easy 6-4, 6-2 win.
Simon took a slower start against