Swiss tennis star Roger Federer, who has won a record 17 Grand Slam titles, has parted ways with his coach, American Paul Annacone, after more than three years.

"After a terrific 3 1/2 years working together, Paul and I have decided to move on to the next chapter in our professional lives," Federer said in a statement posted on his Web site.

The statement announcing that the coaching relationship was ending was released on Saturday, two days after Federer lost in the quarterfinals in Shanghai to France's Gael Monfils.

"When we started together we had a vision of a 3 year plan to win another Grand Slam title and get back to the number #1 ranking. Along with many other goals and great memories, these 2 main goals were achieved," Federer said.

The Swiss great is trying to make it into the eight-man field for the year-end ATP World Tour Finals for the 12th straight year.

Next up for the 32-year-old Federer, whose ranking has dropped to No. 7, is the Swiss Indoors in Basel, his hometown. EFE