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Severiano Ballesteros is back in intensive care after undergoing further surgery at La Paz hospital in Madrid. The five-time major winner's condition is reported as stable and he will remain in the intensive care unit.

The surgical team treating the 51-year-old implanted a valve in Ballesteros's brain on Tuesday to remove fluid. Doctors also repaired a bone defect stemming from one of the procedures the Spaniard has undergone since his initial operation.

Ballesteros was diagnosed with a brain tumour after losing consciousness at Madrid Airport in October.

He underwent a lengthy operation on October 24 to reduce pressure on his brain and remove remaining tumour tissues following two previous operations.

On November 18 he had recovered sufficiently to leave intensive care, although a hospital statement did warn there was a long way to go.