DOHA, Qatar — Maria Sharapova defeated Vera Zvonareva 6-1, 2-6, 6-0 today in the Qatar Open final, remaining unbeaten this season and earning her 18th career title.

The Australian Open champion is 14-0, including two wins in the Fed Cup for Russia this year. Sharapova is 9-0 in Doha, where she won in 2005.

Sharapova broke her opponent twice in the first set, but Zvonareva had two breaks of her own in the second before the fifth-ranked Russian swept the third.

Sharapova earned a first-place prize of $414,000, the largest on the WTA Tour outside of the Grand Slams.