Davenport, who reached the semis in Beijing, is 12-1 since returning to the tour and has won 25 of 29 sets. She marked her return with a win over world No. 3 Jelena Jankovic and has seen her world rank go from No. 234 to No. 126.
A three-time Grand Slam winner and former world No. 1, Davenport's win over Zvonareva was her sixth in as many matches.