Flag on the play.

A shocked Travis Kelce slapped a fan’s hand away after the person attempted to steal his Kansas City Chiefs glove before the game.

According to a video shared online, moments before the Chiefs took on the Denver Broncos in Monday’s season opener, the tight end took off his right-hand glove while walking off the field.

While heading to the locker room, the tight end reached up to fist-bump a few fans when an eager spectator yanked on the athlete’s glove.

Kelce immediately swatted the hand away and scolded the aggressive fan.

Social media users were divided about the incident and shared their thoughts online.

“He shouldn’t have held it in that hand, but also why would anyone think he’s giving his gloves away pregame? Lol,” one user said.

“It look like he was handing it I can see why the fan thought it too,” another added.

Kelce, 36, and the Chiefs went on to defeat the Broncos 31 to 10 at Arrowhead Stadium in Kansas City, Missouri.

On Monday, the “Grotesquerie” actor returned to the field after an uncertain few months, being supported in the stands by his wife, Taylor Swift, his new in-laws, Andrea and Scott Swift — as well as mom Donna Kelce, dad Ed Kelce and brother Jason Kelce.

The “Bad Blood” singer, also 36, rocked a red-and-cream gingham polo dress from BFF Gigi Hadid’s brand, Guest in Residence, as she cheered on her beau alongside legendary actor Tom Cruise.

It’s the first NFL game Travis and Swift have attended since tying the knot at New York City’s Madison Square Garden in July.