Huddersfield midfielder Jonathan Hogg was taken to hospital after suffering a nasty-looking neck injury when he collided with team-mate Mark Hudson in his side's 4-0 loss at Bristol City.
Hogg suffered the injury in the seventh minute and the game was held up for almost a quarter of an hour while he was placed in a neck brace before being carried off on a stretcher.
The 28-year-old was taken to hospital where he required two scans.
Huddersfield manager David Wagner confirmed the nature of Hogg's injury, saying in quotes on the club's Twitter account: "Jonathan Hogg has a neck injury. He could talk, but he has had one scan at the hospital and needs another."
Bristol City won the game 4-0 with goals from Lee Tomlin, Tammy Abraham, Aden Flint and a David Cotterill penalty.
And Wagner felt Hogg's injury had an adverse effect on his players.
He told Sky Sports: "I am sure the situation with Jonathan Hogg caused us maybe mentally some problems."
But he refused to blame the result on Hogg's injury, adding: "We were not able to do what we usually do."
Huddersfield winger Rajiv van La Parra tweeted: "Hope everything goes well with my teammate."