ABU DHABI: World number one Roger Federer has been forced to pull out of the $2 million ATP Dubai Open due to a lung infection.According to the ATP’s website Federer picked up the infection last week and is expected to be out of action for a further two weeks.

The 28-year-old Swiss won the title in Dubai in 2003, 2004, 2005 and 2007 and was runner-up in 2006