In another episode of Tennis Channel's "Coaching in the Bigs", Paul Annacone caught up with Swiss coach Severin Luthi, the longtime coach of Roger Federer.

Federer hasn't competed since the 2020 Australian Open and he underwent a second right knee surgery in June. His return has been slower than fans prefer to see, but he's been training in Switzerland and Dubai as he plots a comeback in March.

Annacone asked what everyone would: what is Federer really like? 

"He’s much maybe much funnier than people would think, that’s maybe first thing," Luthi said. "He’s really very funny and he’s also a very nice guy, OK people know that, but he really is that way."

The two coaches also marveled at how well Federer can bounce back from losses, crediting a great balance of work and home life.  

The 39-year-old is expected to return at the ATP 250 in Doha, starting on March 8, followed by the ATP 500 in Dubai.