Luna stepped from 1977 to at tournaments. His first game he won in October 1977 in Barcelona, but in the episode he was initially able to achieve any significant success. In June 1979, he was the Grand Prix tournament in Berlin in the semifinals. The following year he defeated in Nice, among others, Yannick Noah, and was defeated in the semi-final Bjorn Borg. In 1981 he was in the semifinals of the tournaments of Bastad and Bordeaux, 1982 in the semifinals of Nice and Boston. In the following years were his best results semi-finals, this time in Nice and Bordeaux. In 1984, he stood in Aix -en- Provence for the first time in a final, in which he lost to Juan Aguilera. The following years were without significant results, until 1988, he reached his second final in Madrid. However, in the match against Kent Carlsson he scored only three winnings. After a semi-final in Prague, where he could gezwingen among other things Horst Skoff and Miloslav Mečíř, Luna played from 1989 increasingly on the ATP Challenger Tour. There, at the age of almost 32 years, he scored his first and only tournament victory, as in the finale of Parioli against Magnus Larsson he was victorious in 1990. In the same year he was a finalist in Tampere, where he defeated Renzo Furlan. In 1991, he finished his career. The highest quotation in the tennis world ranking he reached in 1984 with position 33 in the singles and 1988 with position 407 in doubles.
His best individual result at a Grand Slam tournament was reaching the second round of the French Open in 1983., Where he lost to Frenchman Christophe Roger- Vasselin. In the doubles competition, he was never able to qualify for a Grand Slam tournament.
Luna played 1979-1986 13 individual lots for the Spanish Davis Cup team and won nine of them. Between 1980 and 1984 he joined the World Team Cup in Spain.