Chiefs wide receiver Tyquan Thornton suffered a gruesome ankle injury while helping Kansas City to a dramatic win over the Las Vegas Raiders on Sunday.With the Chiefs trailing 17-19 late in the fourth quarter, Thornton connected with Patrick Mahomes for a pivotal 55-yard pass that took Kansas City into the red zone.However, the Chiefs’ excitement soon turned to despair after the damage to Thornton’s leg became apparent. For a moment, he seemed unaware he was hurt – the wide receiver climbed to his feet and began to celebrate before collapsing back to the turf.Thornton had been tackled from behind by Raiders safety Treydan Stukes and following the collision, his ankle was pointing in the wrong direction.After several worrying minutes, Thornton was carted off the field. Legendary CBS broadcaster Jim Nantz warned squeamish fans not to look. Tyquan Thornton suffered a gruesome ankle injury in the Chiefs’ dramatic win over the Raiders Patrick Mahomes took a knee after Thornton suffered the nasty injury in Las Vegas on Sunday Thornton’s ankle was pointing in the wrong direction after he was tackled from behind In the end, the Kansas City Chiefs secured a 30-27 win that sees them move to 4-0But the injury did not prevent the Chiefs from continuing their perfect start to the season and condemning the Raiders – part-owned by Tom Brady – to a first loss of the campaign.Kenneth Walker scored a touchdown to give Kansas City the lead and then, after Las Vegas fumbled the kickoff, the running back crossed again to extend their advantage.But that was not the end of the drama. Kirk Cousins led the Raiders down the other end and found Brock Bowers for a touchdown, with a two-point conversion leaving Las Vegas just three points behind.In the end, the Chiefs secured a 30-27 win that sees them move to 4-0. For Klint Kubiak, meanwhile, this was a first loss since taking over in Las Vegas.