The unseeded Ivanovic won the first 11 games against Pavlyuchenkova, a two-time winner on tour this year.
The Serb said winning the Generali Ladies in Austria three weeks ago, ending a two-year title drought, had boosted her confidence.
Story continues below ↓advertisement | your ad hereIn the semifinals she'll meet 40-year-old Date Krumm, who came from 3-1 down in the last set to beat China's Li, converting her fourth match point when Li double-faulted.
No. 2-seeded Aravane Rezai of France plays Alisa Kleybanova of Russia, and No. 4 Yanina Wickmayer of Belgium meets Daniela Hantuchova of Slovakia to complete the semifinals lineup in the eight-woman tournament.
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