EFEManacor, Spain

Spanish tennis great Rafael Nadal and countryman and veteran NBA player Ricky Rubio presided Wednesday over a graduation ceremony for 33 students of the Rafa Nadal International School, an institution located within the tennis academy founded by the current Grand Slam record holder.

Limping noticeably but without the crutches he used after undergoing "pulsed radiofrequency stimulation" treatment at Barcelona's Teknon clinic for a chronic left-foot injury, the 36-year-old Nadal congratulated the students on completing a portion of their studies and advised them to be "perseverant and humble" in pursuing their dreams.

"You have to work on your virtues, and your determination will make the difference," Nadal told the young people three days after winning a record-extending 14th French Open to increase his overall tally of Grand Slam titles to 22, unprecedented for a male player.