Former world No. 1 Andy Roddick thinks Roger Federer’s latest post is a strong indication that he is confident his recovery is progressing in a good way. This week, Federer posted a workout picture from the gym and captioned it: “Rehab is rocking.” Federer underwent two knee surgeries in 2020 but made his return last year. After playing just five tournaments, Federer underwent a third knee surgery last August. “We’re gonna see him back on court again. He wouldn’t post something like this unless he’s confident in his recovery,” Roddick said on Tennis Channel.Federer aims to return at …