Nadal, 23, who has been dating his high school sweetheart Maria Francisca Perello, nickname Xisca, for three years, had eyes for no one but the 32-year-old singer.
"They were each there with a friend, but once they started talking, they moved to a table alone for some privacy," the New York Post quoted a witness as saying.
"There was flirting going on," the witness added.
Text: ANI