I really love this story..and I'd like to share it with you guys.
After Alekhin had taken the championship title from Capablanca, Capa apparently spent quite a bit of his spare time hanging out in a specific cafe in Paris. Friends, acquaintances, and others would often drop by, participating in games and libations with the former, charismatic, champion. One day, while Capa was having coffee and reading a newspaper, a stranger stopped at his table, motioned at the chess set and indicated he would like to play if Capa was interested. Capa's face lit up, he folded the newspaper away, reached for the board and proceeded to pocket his own queen. The opponent (who apparently had no idea who Capablanca was) reacted with slight anger. "Hey! You don't know me! I might beat you!", he said.
Capablanca, smiling gently, said quietly, "Sir, if you could beat me, I would know you."