Denis Naegelen (born 14 March 1952) is a former professional tennis player from France.

[1] He had his best singles performance at the 1980 French Open, where he beat Jiří Hřebec and Terry Rocavert.

[2] In third round he wasted a two set lead to lose to American Ferdi Taygan, 9–11 in the fifth.

[2] He also took part in the 1973 Australian Open and made the second round of both the singles and doubles.

[2] In 1976, Naegelen was a quarter-finalist at a Grand Prix tournament in Madrid.