
Roger Federer has pulled out of next-month's Davis Cup series against the United States, according to his website, and will skip next week's men's tournament in Dubai as he recovers from a back injury.
Federer, who lost to Rafael Nadal at the Australian Open, said he did not have enough time to completely strengthen his back after hurting it last fall. He is taking the break as a precautionary measure.
Federer's absence is the latest blow for the Barclays Dubai Tennis Championships after the United Arab Emirates refused to grant a visa to Israeli player Shahar Peer, citing security concerns.

