INDIANAPOLIS — Jets cornerback Antonio Cromartie said he was not sure he could play Monday night until just before kickoff.

Cromartie went through a vigorous warm-up with doctors and trainers watching and pronounced himself ready to play, one week after suffering a knee sprain.

“I had a feeling that I could, but I just wanted to be safe rather than go out there and say I’m going to play during the week,” Cromartie said. “The biggest thing for me was to go out and see how I felt and go from that standpoint. I felt good. I felt like I could come out of my breaks and everything.”

A week ago, this would have been unthinkable. Cromartie slammed the turf at MetLife Stadium and had to be carted to the locker room. But there was no ligament damage to the left knee, just a sprain.

Cromartie returned to practice Saturday and then convinced coach Todd Bowles he was ready to play.

“If I didn’t feel like I could go, tell him,” Cromartie said of Bowles’ message. “That’s something I discussed with him. I told him I felt I could go. I felt I was 100 percent. It didn’t bother me throughout the game. I just got fatigued.”

Cromartie gave up a touchdown to Donte Moncrief in the fourth quarter, but other than that played well. He is a key piece in the formidable Jets’ secondary.

When Eric Decker scored a 6-yard touchdown in the first quarter, it was the first time since December 2013 that Colts cornerback Vontae Davis gave up a touchdown. The play was a nice design by offensive coordinator Chan Gailey. Decker went in motion and ran a rub route with tight end Jeff Cumberland. Brandon Marshall was double-teamed on the other side, opening Decker up.

The Colts were 0-for-6 on third-down conversions in the first half, but made 5-of-6 on the opening drive of the second half. They finished 6-of-14. … Rookie WR Devin Smith was inactive. He is still nursing broken ribs. … Calvin Pryor ’s interception was the first of his career.