Wellington, Dec. 14 : American golfer Tiger Woods'' Kiwi caddie Steve Williams has reportedly called his (Woods') fierce rival Phil Mickelson a "prick".

According to stuff. co. nz, Williams says it''s "no secret" the two leading golfers in the world "don''t get along".

Williams'' told the Star-Times in an interview yesterday that the relationship between Woods'' and Mickelson was a festering one, and has been exacerbated with the latter offering a withering assessment of Woods'' while he recovers from knee surgery.