Nadia Petrova has said that she was delighted with her triumph at the Pan Pacific Open tennis tournament.

The Russian defeated Agnieszka Radwanska 6-0 1-6 6-3 in the final in Tokyo on Saturday.

"I feel amazing," said the 30-year-old. "This is the biggest tournament I ever won, and this is a great accomplishment.

"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.

"I used so much energy in the first set and it took a while to get back into the game, and the change of the court helped me a little bit to think about what I needed to do in the third set."

This was Petrova's second title of the season and 12th overall.