DETROIT -- Tampa Bay Lightning captain Steven Stamkos left the 4-3 win against the Detroit Red Wings on Tuesday in the first period after sustaining a lower-body injury.
Lightning coach Jon Cooper said they won't know the extent of Stamkos' injury until he has tests Wednesday.
"You hate to lose any guy, but especially one of the best players in the world," Tampa Bay defenseman Victor Hedman said.
Stamkos was killing a penalty when he fell awkwardly against the boards. He was unable to put pressure on his right leg as he skated to the bench.
Stamkos gave the Lightning a 2-0 lead with his ninth goal of the season at 6:09 of the first period. He played four shifts and skated 2:07 prior to leaving the game.
The center signed an eight-year, $68 million contract with Tampa Bay on June 29. Stamkos broke his right leg on Nov. 11, 2013 and missed 45 games that season.
Video: TBL@DET: Stamkos slams in a rebound on the doorstep