He mentions it in his book. He was down 2 sets and then won the next 2 but ended up losing. If he had of won, that letter would be in the HOF. He actually read it in the locker room before the match, but for whetever reason (he had no idea why) he just re-read it during the match. nice story indeed..just another example that Pete is more human than people give him credit.
"I may come across as a Pete-hater, but I'm not. I have utmost respect for his abilities" Fed_Rulz 2011