 Čilić did not play at the 2012 Australian Open, but did play at Indian Wells, where he lost in the second round to David Nalbandian.He was defeated by Juan Martín del Potro in the third round of Miami and the French Open.In June, Čilić won the Queen's Club Championships in London after his opponent in the final, David Nalbandian, was disqualified in the second set for aggravated behaviour, having kicked the hoarding around a linesman's chair, injuring the linesman.