Roger Federer’s agent tells The Associated Press the 20-time Grand Slam champion is withdrawing from the Miami Open so he can spend extra time preparing to “work his way back out on tour.” Federer has not competed in more than a year after having two operations on his right knee during last season. He is scheduled to make his return to the tour next week at Doha, Qatar. Federer had been on the entry list for the Masters 1000 stop in Miami that starts March 24. But his agent, Tony Godsick, wrote Monday in an email to the AP that Federer will not play there. Federer turns 40 in August.
