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.
New England Patriots
The Ravens first met the New England Patriots in 1996, but the rivalry truly started in 2007 when the Ravens suffered a bitter 27–24 loss in the Patriots' quest for perfection. The rivalry began to escalate in 2009 when the Ravens lost to the Patriots 27–21 in a game that involved a confrontation between Patriots quarterback Tom Brady and Ravens linebacker Terrell Suggs. Both players would go on to take verbal shots at each other through the media after the game. The Ravens defeated the Patriots in the 2009 AFC Wild Card playoff game, 33–14. This was the first time the Ravens had ever defeated the Patriots.
The Ravens faced the Patriots in week six of the 2010 season. The Patriots ended up winning 23–20 in overtime; the game caused controversy from a hit to the helmet of tight end Todd Heap by Patriots safety Brandon Meriweather.
The Ravens played the Patriots for the third consecutive season in the 2012 AFC championship game, which the Ravens lost 23–20. The rivalry reached a new level of friction with this, the second career playoff game between the two clubs. The Ravens clawed to a 20–16 lead in the fourth quarter, but Patriots quarterback Tom Brady dove into the end zone to make the score 23–20 with around 11 minutes remaining; this proved to be the winning touchdown. On the Ravens' last possession of the game, quarterback Joe Flacco threw a pass to wide receiver Lee Evans in the corner of the end zone which looked to be the game-winning touchdown, before a last-second strip by Sterling Moore forced the ball from the hands of Evans, forcing the game to be decided on a last-minute field goal by Ravens placekicker Billy Cundiff. With 11 seconds remaining on the clock, the kicker missed the 32-yard field goal attempt, allowing the Patriots to kill the clock on their way to Super Bowl XLVI for a rematch with the New York Giants.