14-time Grand Slam champion Rafael Nadal is taking care of more housekeeping on his battered body.

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Marca.com is reporting that the Spaniard has undergone a five-week stem cell treatment to aid in the rehabilitation of his lower back.

Nadal's coach and Uncle, Toni Nadal, told the DPA news agency that the ATP world No. 3 is undergoing stem cell treatment in an attempt to alleviate the back problems that hampered him throughout the 2014 campaign.

"He's had them for the past six months,” said Toni Nadal of his nephews issues with the back, according to Marca. "It's stem cell treatment, and doing it properly requires five weeks.”

The back played a huge role in the Australian Open final where Nadal fell to Stan Wawrinka in four sets and had his mobility severely reduced during the match.

"I knew I had no chance of winning, but I had no intention of retiring. It was the worst hour and a half that I have spent on a tennis court," Nadal said in the aftermath. Though Nadal continued to play on and had the issues seemingly under control, he continued to struggle with the back all season.

The back even caused problems at Roland Garros and was on Nadal’s mind heading into Wimbledon.

“I felt that during Roland Garros in the first round, especially in the second round it was worse,” Nadal said at the time. “But it’s true that after the second round I was improving. Today is not the worst day but I feel that I need to improve, I need to rest a little bit. I need to improve a little bit to try to play well in Wimbledon"

Nadal’s physician told the AP that they’ve extracted cells from Nadal recently.

“He has a problem typical in tennis with a back joint, he had it at the Australian Open, and we have decided to treat it with stem cells,” Dr. Angel Ruiz-Cotorro said. “When we have [the stem cells] we will put them in the point of pain,” he added, according to the AP, to aid in “regenerating cartilage, in the midterm, and producing an anti-inflammatory effect.”

The five-week procedure will allow Nadal to begin training again in early December.