WATCH LIVE: Federer in doubles action at the Hopman Cup (ESPN): livio acerbo on lacer2k and greengroundit WATCH LIVE: Federer in doubles action at the Hopman Cup (ESPN): livio acerbo on lacer2k and greengroundit Gennaio 2, 2018 January 02, 2018 at 02:56PM from ESPN via http://espn.go.com/