Rafael Nadal was bothered by back pain in the Australian Open final. Photo: AFP

Rafael Nadal's doctor says the 14-time grand slam winner will receive stem cell treatment on his ailing back.

Angel Ruiz-Cotorro told AP by phone on Monday that "we are going to put cells in a joint in his spine" next week in Barcelona.

The Spanish tennis star was already sidelined for the rest of the season after having his appendix removed last week.

Ruiz-Cotorro, who has worked as a doctor for Nadal for the past 14 years, said Nadal's back pain is "typical of tennis" players and that the treatment is meant to help repair his cartilage and is similar to stem cell treatment Nadal received on his knee last year.

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He said Nadal is expected to return to training in early December.

Several NFL players and baseball players have received stem cell treatment.

Nadal's fellow Spaniard Pau Gasol, centre of the Chicago Bulls, received stem cell treatment on his knee in 2013.

Nadal experienced severe back pain during the final of the Australian Open in January when he lost to Stanislas Wawrinka.

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Nadal to have stem cell treatment