Nadia Petrova pulverised world number three Agnieszka Radwanska's defence of the title by beating her in the final to win the Pan Pacific Open in Tokyo.
The Russian, who stormed back from one set and 1-4 down to beat sixth seed Sara Errani and went on to beat eighth seed Samantha Stosur in the last two rounds, pulled off yet another upset by scoring a 6-0, 1-6, 6-3 victory over the Pole.
"I feel amazing. This is the biggest tournament I ever won, and this is a great accomplishment," Petrova said.
"At the beginning of the tournament, I didn't expect to be here, because I had a back injury, so it's delightful to be here right now."
Petrova fired a sizzling service return winner on a break point to take an early 1-0 lead before whitewashing the first set by finishing off with an ace on her second set point.
Radwanska had to save four break points to finally keep her service in the first game of the second set and pulled off her first break when Petrova hit a forehand into the net to move up 2-0.
Petrova lapsed into making errors and took only one point each in the following three games before keeping the sixth game, but Radwanska hit three aces in a row and a service winner to comfortably even it at one set all.
Neither had a break chance in the final set until the score went to 4-3 for Petrova, who took a break point in the eighth game thanks to Radwanska's two double faults.
Petrova broke the game with a backhand winner to go up 5-3 and calmly served out for the match, hitting a forehand volley winner on her second match point.
It was Petrova's second title of the season, following her victory at 's-Hertogenbosch, and 12th overall.
AFPTags: tennis, sport, japan First posted September 29, 2012 19:49:31