A statement from the World Snooker Tour read: “Neil Robertson has replaced Ronnie O’Sullivan in the draw for the upcoming Johnstone’s Paint Masters. Last year’s champion O’Sullivan was due to face John Higgins in the opening match on Sunday afternoon, but has withdrawn on medical grounds.”

Record eight-times Masters champion Ronnie O'Sullivan has withdrawn from this year's tournament on medical grounds, organisers said on Friday. Englishman O'Sullivan, 49, had been set to face fellow great John Higgins in a blockbuster first-round clash at the 16-player invitational tournament staged at Alexandra Palace.

Ronnie O'Sullivan had been due to begin the defence of his Masters title on Sunday against John Higgins but has been replaced in the draw by Neil Robertson

O'Sullivan withdrew due to medical reasons, with Neil Robertson stepping in for the prestigious Snooker event.

Ronnie O'Sullivan, a record eight-times Masters champion, has withdrawn from this year's tournament due to medical reasons. Neil Robertson will replace him. O'Sullivan, who has previously criticized the venue,

Snooker star Ronnie O'Sullivan has withdrawn from the Masters on medical grounds at Alexandra Palace, bringing his quest for a record-extending ninth title to an end.

The seven-time world champion has made a last-minute decision to pull out of this year's Masters, a day after whacking his cue on the table in frustration during a defeat to Rob Milkins.

Defending champion Ronnie O'Sullivan has withdrawn from the Masters on medical grounds. O'Sullivan, 49, was aiming to win a record-extending ninth title, and had been set to face John Higgins in a blockbuster opening to the tournament at Alexandra Palace on Sunday.

Ronnie O’Sullivan has withdrawn from the upcoming Masters tournament at Alexandra Palace at short notice “on medical grounds”. O’Sullivan was the defending Masters champion after beating Ali Carter in the final last year and was due to face long-time rival John Higgins in the opening match of the tournament on Sunday afternoon but has pulled out just 48 hours beforehand.

REIGNING CHAMPION RONNIE O’Sullivan has withdrawn from the upcoming Masters on medical grounds. The world No 3, who has won the competition eight times, was due to face John Higgins in the opening match on Sunday afternoon.