Tennis has a very strange way of scoring in games.
15 - 30 - 40 - Game. I believe it used to be 45 instead of 40, but 40 is faster to say so it got truncated. I think 10 - 20 - 30 - Game would be faster still.
30-30 (“30 all”) is not Deuce, even though they are identical.
40-30 is not Advantage, even though they are identical.
Wups! My mistake. 
I actually knew that; I don’t know why I typed 45. 
I’d edit my earlier, but then your correction wouldn’t make sense in context. So I’ll just “let my piece hang.” Or… Advantage: Artichoke. 
Could be worse. I could have had a heart attack at a tournament and thus lost (or forfeit lost) a game. 
:mrgreen:
However, if the player failed to make a proper claim of a win on time, the game would have to be continued to the next time control.
Probably because it makes more sense than 40. As I said, I believe it used to be 45. Deuce.