The typical sport that uses the term, "deuce", is Tennis or Table Tennis.
Trampoline Tennis Table-tennis
Pickeball is a racquet sport which combines elements of badminton, tennis, and table tennis.
Tennis, badminton, table tennis, volleyball and beach volleyball.
Water closet. Winston Churchill. In tennis, wc stand for Wild card.
WC is stand for "Water Closet, toilet".
WC is the acronym for "washcloset" or bathroom.
WC might have it to stand for "West Coast"
the 'wc' which is in front of the players instead of rankings means "Wild Card" which the tournaments summoned like a wild card
A water closet is an English equivalent of 'un WC'. The indefinite article 'un' means 'a, an, one'. The letters 'WC' stand for 'water closet'.
MIght be the maker's initials.
The Scrabble dictionary contains 4,069 words that have a "q" in them. You might want to narrow it down a bit. grep q sowpods.txt |wc 4069
Could it be as simple as water closet
International Tennis Federation.
Women's Tennis Association