Nadal allegedly pursued a hair transplant in 2016, visiting a specialist clinic in Spain to have the procedure carried out.
The surgery, called a follicular unit extraction, extracts thousands of hair follicles one at a time from the back of the head.
These follicles are then re-implanted in bald patches and allowed to grow out over several months.
The process requires a skilled surgeon and a can leave tiny scars where the hair is removed from.
Source: | This article first appeared on Express.co.uk