I’ve driven myself mad – Ronnie O’Sullivan says he has changed his thinking

Ronnie O’Sullivan says he has driven himself ‘insane’ over the last two years (Bradley Collyer/PA)

Ronnie O’Sullivan says he has driven himself “mad” for two years and has gone back to basics after thrashing Ali Carter 10-2 to reach the semi-finals of the Tour Championship.

O’Sullivan and Carter had a Manchester reunion in what had been termed a grudge match following their ill-tempered meeting at the Masters final in January, which ‘The Rocket’ won 10-7 to claim an eighth title.