The Pittsburgh Steelers held on for their fourth consecutive NFL win after withstanding a late surge from the Chicago Bears 29-27.

Chris Boswell's 40-yard field goal lifted the Steelers (5-3) as Cairo Santos' last-gasp 65-yard effort fell short in Pittsburgh on Monday.

Justin Fields had led the rallying Bears (3-6) to a 27-26 lead with less than two minutes remaining, dazzling with a 16-yard pass to Darnell Mooney during the closing stages as Ben Roethlisberger and the Steelers were left with work to do.

Roethlisberger (21-of-30 passing for 205 yards and two touchdowns) fuelled a seven-play drive to get Boswell into position for the game-winning kick – the Steelers snapping a three-game skid against the Bears as Santos, who had made 40 consecutive field goals, four short of the all-time record, failed in his reply.

No team in NFL history had more wins on Mondays than the Steelers entering the contest and they set out to extend that run after Najee Harris' 10-yard rush gave the hosts a 7-0 lead at the end of the opening quarter.

The Steelers continued to dominate – Roethlisberger throwing touchdown passes to Pat Freiermuth in the second and third quarters for a commanding 20-6 advantage heading into the final period.

T.J. Watt also reached 60 career sacks in his 69th appearance, with only three players reaching the mark in fewer games – Hall of Famers Reggie White and Derrick Thomas, and brother J.J. Watt.

Chicago erased the deficit behind Mooney, who rushed for a score and caught Fields' (17-of-29 passing for 291 yards, a TD and interception) throw in the fourth quarter, but the Steelers had all the answers in a tight finish.