http://assets.espn.go.com/i/tvlistings/tv_espn_original.gif en-us 10 ESPN Inc. http://espn.go.com/ Copyright 2010 ESPN Inc. Is Roger Federer out of gas as the tour rolls into London for the year-ending ATP World Tour Finals? And if Fed can't get stoked to secure the No. 1 ranking, who might burst through the door he leaves open?]]> November 19, 2009 12:52:27 PST