Jankovic cruises into U.S. Open semis

Second seed Jelena Jankovic cruised into the semi-finals of the U.S. Open with a 6-1 6-4 win over 29th seed Sybille Bammer on Tuesday.

Playing in her first quarter-finals at a grand slam, the Austrian Bammer struggled to make headway against a rock-solid Jankovic who controlled the match from the start.

After battling through in earlier rounds, Jankovic was a model of consistency, registering only 14 unforced errors, and never looked in serious danger against Bammer. Bammer, by contrast, scattered 40 errors against the 23-year-old Serb, who is one of four players who can overtake her compatriot Ana Ivanovic as world number one at the end of the tournament.

Jankovic, who reached the number one ranking for one week last month, has yet to reach a grand slam final, having lost in the semi-finals four times, including Flushing Meadows in 2006.

Jankovic will meet Olympic champion Elena Dementieva of Russia. The fifth seed beat Swiss 15th seed Patty Schnyder 6-2 6-3 in her quarter-final.