Roger Federer, who is having the worst season of his career after becoming a grand slam champion, has fired his coach Paul Annacone following a year where he failed to reach a grand slam final.

As CNN.com reports, Federer made the announcement in a posting on his website. The Swiss tennis legend wrote,"After numerous conversations culminating at the end of our most recent training block, we felt like this was the best time and path for both of us."

Federer added that his three-year partnership with Annacone was built on two main goals- win another grand slam and reclaim the world number one ranking. "Along with many other goals and great memories, these 2 main goals were achieved.

The American coach used to be in the corner of another tennis legend, 14-time grand slam winner Pete Sampras and former British No. 1 Tim Henman.

Still, Federer maintains that there was no animosity between him and his erstwhile coach. "Paul remains a dear friend, and we both look forward to continuing our friendship. I want to thank

Paul for his help and the value he has added to me and my team," he added.

CNN reports that Federer may likely continue to work with Swiss Davis Cup captain Severin Luethi, who often accompanies him to tournaments, as he competes in the year-end championships in London.

Earlier, Federer was quoted as saying that he was looking forward to a great 2014 and the firing of his coach could indicate that the Swiss legend is determined to win another grand slam next year.