Coach Lindy Ruff said before the game that Sekera will miss at least a few days and potentially longer.
Sekera was hurt Saturday, when he was struck in the leg by Canadiens defenceman Alexei Emelin's shot in the first period of a 6-1 loss at Montreal. He played a few more shifts before missing the final two periods.
The Sabres are already missing veteran defenceman Robyn Regehr (lower body), who will miss his fourth straight game. Ruff said Regehr is expected to return to practice this week.
He's only 17 but he can see the ice so well and he moves the puck and goes to the open ice all the time, so I just think he's a player that is ready to play in the NHL. I'm really looking forward to coaching someone like this.
— U.S. National Junior Team coach Ron Wilson on Auston Matthews, the projected No. 1 pick of the 2016 NHL Draft