Partnering Henri Cochet they lost the final in five sets to Jean Borotra and Jacques Brugnon.

In 1928 De Buzelet won the singles title at the French Covered Court Championships, played at the Tennis Club de Paris, after a five-sets victory in the final against Pierre Henri Landry.

[1] De Buzelet and compatriot Christian Boussus were runners-up at the 1931 German Open Tennis Championships after losing the final in fives sets to Walter Dessart and Eberhard Nourney.

In 1928 he reached the fourth round in singles event which he lost in straight sets to Umberto de Morpurgo.

In the doubles event that year he teamed up with Édouard Borotra and lost in a five-set encounter in the third round to Frank Hunter and Bill Tilden[2]