Man United manager had no tactical prowess so I left for Chelsea - he was very upset with me

Bosnich criticised Ferguson's tactical ability after joining Chelsea in 2001, saying the manager was fortunate to have great players rather than being tactically gifted.

Former Manchester United goalkeeper Mark Bosnich has claimed Sir Alex Ferguson lacked tactical prowess, comparing him to an average jockey riding a champion horse. Speaking after his 2001 move to Chelsea, Bosnich acknowledged Ferguson's motivational strengths and eye for talent but argued his tactical abilities were negligible.

Bosnich's relationship with Ferguson was complicated. Ferguson had personally brought him to Old Trafford as a 16-year-old schoolboy in 1989, but Bosnich returned to Australia in 1991 after failing to secure a work visa. When Bosnich later declined Ferguson's offer to return, the manager was "very upset." United re-signed him in 1999 as Peter Schmeichel's replacement, but injuries and inconsistent form saw him drop down the pecking order after Ferguson signed Fabian Barthez in 2000.

Bosnich left for Chelsea on a free transfer midway through the 2000/01 season. His time at Stamford Bridge was plagued by injury, and his career derailed in September 2002 when he failed a drugs test and was subsequently sacked and banned from football for nine months. In his 2013 autobiography, Ferguson called Bosnich a "terrible professional" who would arrive late to training and overeat, to which Bosnich responded by noting he was the only player Ferguson signed twice at United.