The ATP Challenger Cancún (officially: Abierto Internacional Varonil Casablanca Cancún ) was a tennis tournament that was held annually from 2008 to 2010 in Cancún , Mexico . It was part of the ATP Challenger Tour and was played outdoors on clay. No player won the tournament more than once; Grega Žemlja , however, was twice in the finals, of which he won one.