American football rules
Super Bowl LI was the first Super Bowl to go into overtime with a 28-all tie between the Atlanta Falcons and New England Patriots, which the Patriots eventually won with James White scoring a touchdown on the Patriots' first drive.
2007 New England Patriots season
The Patriots were not able to join the 1984 49ers and 1985 Bears as Super Bowl champions, losing the Super Bowl and failing to go 19–0 and claim their fourth Super Bowl victory. They would have become just the fourth team to win at least four Super Bowls (joining the 49ers, Steelers, and Dallas Cowboys, each of whom had won five at the time). In Super Bowl XLII, the New York Giants defeated the Patriots 17–14 in one of the biggest upsets in NFL history.