(CNN) -- Tiger Woods' five-year reign at the top of the world golf rankings appears to be almost over after the defending WGC-Bridgestone Invitational champion slumped to a five-over-par 75 at one of his favorite courses on Saturday.
The American, who has won a record seven times at Firestone in Akron, Ohio, remained at the tail of the 81-man field -- 18 shots behind clubhouse leader Retief Goosen, who had yet to tee off when the American had finished his third round.
World No. 2 Phil Mickelson had also yet to begin, but will do so in the knowledge that he needs to finish just fourth to break his longtime rival's run of 270 weeks at the top.
The Masters champion will start his round tied for second with Justin Leonard on six under, one shot behind Goosen. CNN
