[6] Washer won the Belgian National Championships nine times between 1945–1954, the only exception being 1950 when he was forced to retire from the competition due to illness.

[5] The same year, he won the Lebanon international tennis championships by defeating Roger Becker, Ham Richardson, and Warren Woodcock.

[7] In 1967, he came back from retirement to win the Belgian National Covered Courts Championship doubles, partnering with Jacky Brichant.

[8] Washer did not play in the 1960 Davis Cup match against Great Britain as he was competing in the Belgium Open golf championship.

[13] In 1955, he lent his own Ferrari 250 Europa GT Pinin Farina Coupe car to Olivier Gendebien who drove it in the Liège–Rome–Liège rally and finished third.