Chicago, Illinois - The Buffalo Bills overturned a half-time deficit to defeat the Chicago Bills 35-13 on Saturday and clinch the AFC East title three-peat!

The freezing conditions in Chicago gave this the feel of a home game for the Bills, but they were far from comfortable early on and threatened to blow their lead in the race for home-field advantage in the AFC.

Josh Allen responded to Justin Fields' opening touchdown drive by leading Buffalo down the field and completing a 19-yard TD pass to Gabe Davis.

But the Bills missed the PAT, and the only score for the remainder of the half was a successful Bears field goal, giving Chicago a 10-6 lead through two quarters.

The hopes of the Bears – and Buffalo's AFC rivals – were quickly dashed in the second half, however, as Devin Singletary dashed in from 33 yards and then James Cook followed him from 27 yards for a second score in double-quick time either side of a Chicago fumble.

An unconvincing Allen display, which included two interceptions and a recovered fumble, kept the Bears in contention, yet they could not capitalize.

In the end, the Bills QB finished in more familiar fashion with a rushing score and a TD pass to Dawson Knox in the closing stages as Buffalo took another step towards the first seed.

The pressure had been on the Bills because there never appeared any possibility of the Kansas City Chiefs not defeating the stumbling Seattle Seahawks. A 24-10 victory was Patrick Mahomes' first against the Seahawks, meaning the Indianapolis Colts are the only team he has now played but not beaten.

The Cincinnati Bengals also remain in contention at the top of the AFC after a dominant first half against the New England Patriots. Joe Burrow completed 28 passes – a season high for any QB in any half – for 284 yards and three touchdowns before half-time, meaning the Bengals could just about withstand a second-half pick six in a 22-18 win.

The Patriots' defeat meant the Baltimore Ravens clinched their playoff berth with a 17-9 defeat of the Atlanta Falcons.

Having claimed a record-breaking comeback win last week, the Minnesota Vikings had to hold off a rally from the New York Giants, who tied the game late on. However, a 40-yard field goal from Greg Joseph had defeated the Colts, and he topped that effort with a 61-yard conversion as time expired for a 27-24 Vikings victory.

The Detroit Lions, Minnesota's NFC North rivals, saw their three-game winning run ended by the Carolina Panthers. Both the Panthers and the New Orleans Saints improved to 6-9, firmly in contention in the NFC South.