John Isner appears on David Letterman

John Isner who became famous overnight because of his record-breaking match against Nicolas Mahut was on The Late Show with David Letterman on Monday to present Letterman's Top 10.

Here's a recap of the top 10 again.

"Thoughts That Went Through John Isner's Mind During the 11-Hour Tennis Match."

10. "I'm exhausted."
9. "We've been playing so long, I've forgotten - am I Isner or Mahut?"
8. "Remember when I said I was exhausted? That was 8 hours ago!"
7. "Wonder if I'll be sore tomorrow."
6. "I'm gonna lay back until 51-50, then make my move."
5. "I'm asleep."
4. "Why couldn't I have played Federer? It would've been over in 15 minutes."
3. "Cramp!"
2. "Honestly, I don't care if I win or lose - I just don't want to die."
1. "Larry King has had marriages that didn't last this long."

Andre Agassi bids farewell to hair piece on David Letterman show

Andre Agassi appeared on the "Late Show with David Letterman" last week to promote his memoir, Open.

Agassi began by joking about his crystal meth use in the past: "That was actually a typo in the book. I said I did math in 1997."

Alright, Agassi, that wasn't funny at all.

The highlight of the show was when his faux hair was brought out.

I'm not sure if it's just me. I don't find it funny either. Perhaps this is the last time I'm going to blog about Agassi and his book.

VIDEO: Serena Williams on "Late Show with David Letterman"

Serena Williams appeared on the "Late Show with David Letterman" on CBS on Monday night, two days after beating her sister in the Wimbledon final then teaming with Venus to win the doubles title.

Earlier she was spotted arriving at the Ed Sullivan Theater looking fabulous and yet casual.

Too bad... I don't think we'll ever going to get Roger Federer on the show.

If you haven't watch the interview yet, here you go.