Ronnie O’Sullivan has withdrawn from the upcoming Masters tournament at Alexandra Palace at short notice “on medical grounds”.

Ronnie O’Sullivan has withdrawn from the Masters and will not defend his title at Alexandra Palace this month. World Snooker Tour confirmed on Friday morning that the Rocket has withdrawn ‘on medical grounds’ and will be replaced in the draw by Neil Robertson.

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 Last year’s champion O’Sullivan was due to face John Higgins in the opening match on Sunday afternoon, but has withdrawn on medical grounds.”

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

Defending champion Ronnie O'Sullivan has withdrawn from the Masters on medical grounds.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Ronnie O'Sullivan has withdrawn from The Masters on medical grounds and will be replaced in the draw by Neil Robertson, with his first-round opponent John Higgins now facing the Australian

Ronnie O'Sullivan has been forced to withdraw from The Masters due to medical reasons, with Neil Robertson stepping in to face John Higgins in the first round

Masters has been dealt a huge blow with defending champion Ronnie O'Sullivan withdrawing from the tournament. The World Snooker Tour confirmed O'Sullivan's withdrawal on Friday morning, announcing Neil Roberston would be replacing him.

Record eight-times Masters champion Ronnie O'Sullivan has withdrawn from this year's tournament on medical grounds, organisers said on Friday.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.