The slumping Islanders edged out the Senators for a shootout victory on Tuesday, but it may have come at a cost.
Islanders starting goalie Robin Lehner had to leave the game late in the third period after Ottawa's Brady Tkachuk bulldozed over him on a controversial game-tying goal.
Lehner skated off the ice on his own but was presumed to be undergoing tests for a concussion, per Brett Cyrgalis of The Post.
Tkachuk was driving to the net with the puck with Brock Nelson fighting for it behind him when he crashed into Lehner.
The puck stayed behind Tkachuk but Jean-Gabriel Pageau flicked it into the net with Lehner down on the ice.
It was initially ruled a "no goal" but a video review ruled that Nelson drove Tkachuk into Lehner and the call was overturned.
Thomas Greiss replaced Lehner and the Islanders were able to salvage the game in the shootout.