The previously unbeaten Buffalo Bills and Philadelphia Eagles both slumped to shock defeats in the NFL on Sunday as the injury-hit Baltimore Ravens suffered a humiliating blowout.

The Bills -- regarded by many as favourites for this season's Super Bowl -- were stunned 23-20 by the resurgent New England Patriots in a pulsating duel at Buffalo's Highmark Stadium.

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.