Advantage
the server
The ad side of a tennis court is the players left side. Or the opponents right side.
International Tennis Federation.
It is either ad in or ad out. If the server won the point it is ad in and if the returner won the point then it is ad out.
It stands for Women's Tennis Association
When serving or returning, there is a deuce side and an ad side. The deuce side is on the right, the ad side is on the left.
ad in, Ashe
Ursula Mayes
The acronym AD stands for Anno Domini.
'Des tennis' are most probably 'des (chaussures de) tennis' which are tennis shoes in English. That could also stand for 'des (terrains de) tennis', which are tennis courts.
Domini