Advantage out

What does the tennis term “Advantage out” mean?

How to understand “Advantage out” in tennis?

When the server’s opponent has the advantage, the score may be called as “advantage out”. This phrase is sometimes shortened to “ad out” (or “your ad”). Alternatively, the players’ names are used: in professional tournaments the umpire announces the score in this format (e.g. “advantage Nadal” or “advantage Williams”).

Aston Villa – Manchester United
Football. England Premier League
Chelsea – Nottingham Forest
Football. England Premier League
Aston Villa – Manchester Utd
Football. England. Premier League
Chelsea – Nottingham
Football. England. Premier League
Lyon – Nantes
Football. France - Ligue 1
Bologna – Parma
Football. Italy - Serie A
Lazio – Empoli
Football. Italy - Serie A
Alaves – Barcelona
Football. La Liga
Dynamo Kyiv – Kryvbas
Football. Ukrainian Premier League
Brighton & Hove – Tottenham Hotspur
Football. England Premier League
Slavia Prague – Sparta Prague
Football. Czech Republic - Fortuna Liga
Sevilla – Betis
Football. Spain - LaLiga
Stuttgart – Hoffenheim
Football. Germany. Bundesliga
Fiorentina – AC Milan
Football. Italy. Serie A
Nice – PSG
Football. France. Ligue 1
Real Sociedad – Atl. Madrid
Football. Spain. LaLiga
Albacete – Cordoba
Football. Spain. LaLiga2
Czech Republic – Netherlands
Football. Euro U17 Women qualification
Farjestad – Ocelari Trinec
Hockey. Champions League
IK Sonderjyske – Tappara
Hockey. Champions League
Skeleftea – SAPA Ferhevar
Hockey. Champions League
B.Whittaker – L. Cameron
Boxing. Fight Night in Riyadh
A. Beterbiev – D. Bivol
Boxing. Top Rank
S. Nikolson – R. Chapman
Boxing. WBC Title
P. Kincl – K. Engizek
MMA. Oktagon 62
F. Wardley – F. Clarke
Boxing. British and Commonwealth Titles
C. Eubank Jr. – K. Szeremeta
Boxing. IBO Title
J. Opetaia – J. Massey
Boxing. IBF Title
B. Royval – T. Taira
MMA. UFC Vegas 98
J. Nakatani – T. Salapat
Boxing. WBC Title