A right-handed player, Nunna featured on the professional tour in the late 1970s, after playing college tennis in the United States for Clemson University.

[1] He reached a career high singles ranking of 199 in the world.

[citation needed] Competing on the Grand Prix circuit, his best performance was a runner-up finish in the doubles at the 1976 Indian Open, partnering Chiradip Mukerjea.

He made the singles second round of the 1979 Sarasota indoor tournament, where he fell to Ilie Nastase.

[2] Nunna appeared in the men's doubles main draws at the 1977 Wimbledon Championships and 1979 French Open.