Lee Westwood, the former world No 1, has left the ISM management group after 24 years and has split from his manager, Chubby Chandler. Along with Darren Clarke, Westwood, with 43 worldwide titles to his name, was one of Chandler's first clients after he founded the agency back in 1991. Westwood is set to sign with IMG.

His departure is clearly a blow for Cheshire-based ISM, which remains one of the biggest players in the market, despite losing players of the calibre of Rory McIlroy, Charl Schwartzel and Matt Fitzpatrick in recent years.