Buffalo Bills.
(Image credit: Bryan M. Bennett/Getty Images)

The NFL is already at the quarter-season mark, and Week 4 should provide some insight on who the real contenders. Here are four matchups to check out Sunday.

New England Patriots vs. Buffalo Bills, 1 p.m. ET on CBS — This one features undefeated intra-division rivals. New England has coasted to a 3-0 mark, while Buffalo has surprised people with its dominant defense to match the Patriots win-for-win so far. But Sunday will be a big test for Buffalo, who have only beaten Patriots quarterback Tom Brady twice in their home stadium in 17 tries.

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Tim O'Donnell

Tim is a staff writer at The Week and has contributed to Bedford and Bowery and The New York Transatlantic. He is a graduate of Occidental College and NYU's journalism school. Tim enjoys writing about baseball, Europe, and extinct megafauna. He lives in New York City.