Defeated Federer hails Canas

Roger Federer praised Guillermo Canas after the Argentinian defeated the world number one for the second time in as many weeks in the fourth round of the Sony Ericsson Open.

Canas followed up his victory in the Pacific Life Open earlier this month with a thrilling 7-6 (7-2) 2-6 7-6 (7-5) win.