"He is very good on grass, we always forget he has won Wimbledon twice" - Andy Roddick on Rafael Nadal's chances at the grasscourt Major

Andy Roddick recently included Rafael Nadal's name in a Tennis Channel discussion on potential candidates to win Wimbledon.

Roddick emphasized Nadal's excellence on grass, reminding everyone that the 14-time Roland Garros champion has won Wimbledon twice. The American, however, also expressed wariness about Nadal's preparations following the radiofrequency procedure on his left foot.

"Is Rafa Nadal, did that procedure help? Is he going to be able to play well on the grass? When he is there, he is very good on grass," Roddick said. "We always forget that he has won Wimbledon twice, right? We don't give him enough credit just because he's so good on clay."

Nadal first won Wimbledon in 2008, following an epic battle against then five-time champion Roger Federer. The Spaniard won the Championships for a second time in 2010, defeating Tomas Berdych in straight sets in the final.

While the terre battue is undoubtedly Nadal's best surface, where he has posted 474 wins and just 45 losses (91.3%), the King of Clay also has a good record on grass (71-20, with a win percentage of 78).

With his record-extending victory at Roland Garros earlier this month, Rafael Nadal is, for the first time in his career, the reigning champion at the year's first two Majors. Theoretically, he is is well on his way to an historic Calendar-year Grand Slam.

But the revelation about the injections he received on his chronically injured foot during the Roland Garros fortnight, coupled with the radiofrequency treatment he eventually underwent, have cast doubt over his participation at Wimbledon.

The AFP recently reported that the Spaniard's uncle, Toni Nadal, believes Nadal will play at Wimbledon.

"He is planning to train on the sidelines of the Mallorca Open from Monday (June 13)," Toni Nadal was quoted as saying. "If he has a small chance, he will play at Wimbledon."

In addition, a Marca article reported on Monday that Nadal had begun training on the grass courts of the Santa Ponca Country Club in Mallorca.

Rafael Nadal fans hopeful of the Spaniard's recovery in time for Wimbledon

Rafael Nadal during his 2019 Wimbledon semifinal against eight-time champion Roger Federer

Rafael Nadal gave a glimpse of his time off on his Instagram last Sunday, posting a photo of himself with his family and friends on a boat.

"Good morning... have a nice Sunday. With family and friends always special," said Nadal in Spanish.

Eagle-eyed fans on Twitter, however, noticed how Nadal was putting his normal weight on his left foot, and took it as a good sign.

"Anyone else notice that Rafa has his weight on his left foot in this pic?" one fan asked.

"That's good, reason why his uncle said he will start practicing on grass on Monday," another fan pointed out.

"Yeah I zoomed in that foot on impulse, wanted to see my Champ’s condition. He will pull through," another fan opined.