Jankovic and Dementieva go through to quarters

SECOND seed Jelena Jankovic and fifth seed Elena Dementieva have booked their spots in the quarter-finals of the US Open.

Jankovic dropped her opening set against Caroline Wozniacki but advanced with a 3-6 6-2 6-1 victory over the Dane.

After suffering through a slow start, the 23-year-old Serbian kicked things into gear, wrapping up the final two sets in just over an hour.