Uh, Glyn, I think it's the only phrase that he knew. As such, John remained mute all year until Wimbleton.
Of course, before God, Queen, and country, he'd show off his mastery of our shared language. While phrases were limited to one, J.E. had a large vocabulary of !#@$%@# and his favorite, (of course) *&^#$@!
One of America's finer examples of public decorum while abroad.
As talented a tennis player as he was, he nonetheless missed his true calling serving our nation from foggy bottom.