Mecir didn't seem to handle the pressure really well. Is this true?
It was more who his opponents were than pressure in general. Against Lendl he was generally intimidated, losing to him badly twice in major finals. I've seen him win against top players (Becker, Wilander, Edberg, McEnroe, Connors) in later rounds and finals of tournaments. I think his problem with Lendl was that he was playing a fellow, established Czech star and that after his defection to the U.S., his own country had placed so much in him to carry the nation's honor, especially against the former Czech.