DUBAI, United Arab Emirates — Roger Federer has withdrawn from the Dubai Championships because of a lung infection.

Organizers said on Sunday that the top-ranked Swiss star picked up the infection last week and will miss the $2 million event, which starts Monday, for the second straight year.

A four-time winner in Dubai, Federer will rest for two weeks and is expected to return at Indian Wells on March 11.

Jan Hernych of the Czech Republic replaces him in the main draw.

Andy Roddick, the 2008 champion, withdrew from the tournament on Saturday.

Defending champion Novak Djokovic, Australian Open runner-up Andy Murray, Nikolay Davydenko, Jo-Wilfred Tsonga and Marin Cilic are the top-10 ranked players in the field at the hardcourt event.