Stockholm, Sweden (AHN) - Annika Sorenstam says she will play in fewer tournaments for the remainder of this season because of her aching back and will use the majority of her focus on participating in the LPGA Tour's major tournaments.

"I will play less, prepare more and really go for the big competitions," Sorenstam told Swedish broadcaster SVT.

Sorenstam, 36, found out last week that she has a ruptured and herniated disk in her back that will require her to miss at least a month from the LPGA Tour.

"I have seen the X-rays and there's an injury that has been there for a long time and I have just kept on playing," Sorenstam said.

Sorenstam said she is still optimistic about winning another grand slam in her career. She currently has 69 LPGA Tour victories and 10 major titles.

"I think it's realistic. This year I had planned for it, but it didn't happen," Sorenstam said. "I trained really hard in February and it is probably one of the reasons why I obtained this injury."