In a land far removed from the hallowed lawns of Wimbledon, Roger Federer ventures into the Swiss Alps with celebrity survivalist Bear Grylls and finds himself eating fish eyeballs and descending a treacherous frozen waterfall, among other horrors. View special excerpts from the show, which will air in the United States Sunday July 8 at 7pm ET/PT and 6pm CT on NBC. Video courtesy NBC. Photo: Ben Simms/NBC.

Roger Federer Is Running Wild With Bear Grylls