New York Giants upset New Orleans Saints, 27–21

The Giants closed as 7.5-point underdogs and won outright in overtime. The betting market gave them a 25% chance.

All 2021 NFL Week 4 upsets, biggest first

An NFL upset is an underdog getting 3.5 or more points on the closing line winning outright. Upset size is the points it overcame. How it’s scored

1. New York Giants 27, New Orleans Saints 21

   7.5-point underdog25% to winOTRecap
   Upset size7.5
2. New York Jets 27, Tennessee Titans 24

   5.5-point underdog32% to winOTRecap
   Upset size5.5
3. Arizona Cardinals 37, Los Angeles Rams 20

   3.5-point underdog35% to winRecap
   Upset size3.5