What is the mental effect of a first defeat on an undefeated fighter?

[Pac=Duran]

Like how did varous greats cope with their first loss?

[CANELOLUJAH]

did fighters take it differently.

Look at mayweather after castillo he came back with vengeance, then look at mares he scared like a lil bitch.

[Deeznuts]

Pacquiao became more defensive minded after his loss, many never recover from it. Cotto style also changed until he got with Freddie. I noticed after the Margarito fight when the going got tough for Cotto, he would back peddle and try to use his jab.

[Doctor_Tenma]

I saw changes in Cotto, everything looked like a flashback of the Margarito fight, even when he wasn't facing punchers...namely Clottey. Wasn't the same body puncher either.