The ATP Challenger Caloundra (official name: "Caloundra International" ) was a tennis tournament in Caloundra , which was last held in 2012. It was part of the ATP Challenger Tour and was played outdoors on hard courts. Lu Yen-hsun was the only player to win the tournament twice. He won the singles competition in 2004 and 2006. He also won the doubles competition in 2004 alongside Luke Bourgeois .