[1] Defalle began his football career at FC Liégeois in 1895, helping his side win the inaugural Belgian championship in 1895–96.

[2] During this period, Liégeois had an unbeaten run of 23 official matches that lasted over two years, between 28 February 1897 and 12 November 1899, coming to an end in a 5–3 loss to Antwerp FC; Defalle did not play this match, and without him, the champions proved unable to withstand the constant pressure from the local footballers.

[3] He stayed loyal to the club for a decade until 1905, when he left for Racing de Bruxelles, where he retired five years later in 1910.

[1] On 28 April 1901, Defalle participated in the very first match of a Belgian national team at the 1901 Coupe Vanden Abeele, keeping a clean sheet in an 8–0 trashing of a third-rate Dutch side.

[4] He was one of the three Liégeois players to feature in this match, the others being Harry Menzies and Lucien Londot; however, this match is not officially recognized by FIFA because of the presence of foreign players in the Belgium side, including Menzies.