Roger Federer's "Imaginary Line Rule" + Running PLAYSDiscuss on Facebook Opens in a new window Wanna discuss this video? Head over to our Facebook Group and post about it there!You might also like: About Federer's second match point against Djokovic at Wimbledon... Want to approach but your volleys STINK? Use "The Layup". How Federer avoids "The Red Zone" against Djokovic Post navigation« Previous PostNext Post »