The NFL's two remaining undefeated teams face stiff tests this week, but only one must win on the road to stay among the unbeaten ranks. The Super Bowl-champion Packers return to the scene of their most emphatic postseason triumph last season, the Georgia Dome, where they shocked the top-seeded Falcons, 48-21, in the NFC Divisional Playoffs.
The Lions, meanwhile, face a familiar foe in their quest to go 5-0: last season's NFC North champs, the Chicago Bears, who will try to temper the hype in Detroit's first prime-time game at Ford Field.
Philadelphia at Buffalo (Sunday, 1 p.m. ET)
Tennessee at Pittsburgh (Sunday, 1 p.m. ET)
Green Bay at Atlanta (Sunday, 8:20 p.m. ET)
