How to Hit a One-Handed Backhand Like Roger Federer

Roger Federer is right now the best tennis of all time with 17 grand slams winning:
Australian Open W (2004, 2006, 2007, 2010)
French Open W (2009)
Wimbledon W (2003, 2004, 2005, 2006, 2007, 2009, 2012)
US Open W (2004, 2005, 2006, 2007, 2008)