Well, I was surfing the web and came across this website and it really surprised me! This is the world's Highest tennis court EVER!! it's only 65 meters shorter than the Empire State Building! It's located in Dubai and called the Burj Al Arab.
And Federer & Agasi played with each other on this court as well. =)
After seeing the third picture, I always wondered that if one of them had lobbed the ball, then can't the other guy just fall off the end if they keep running for it? idk, what do you guys think?