Vegas Golden Knights' Nicolas Roy (10) moves in aagainst Montreal Canadiens goaltender Carey Price as Canadiens' Jeff Petry defends during first-period Game 4 NHL Stanley Cup playoff hockey semifinal action in Montreal, Sunday, June 20, 2021. (Graham Hughes/The Canadian Press via AP)

Montreal Canadiens' Eric Staal tries to poke the puck away from Vegas Golden Knights goaltender Robin Lehner as Golden Knights' William Karlsson covers during first-period Game 4 NHL Stanley Cup playoff hockey semifinal action in Montreal, Sunday, June 20, 2021. (Paul Chiasson/The Canadian Press via AP)

Montreal Canadiens' Corey Perry can't get the puck past a net left empty by Vegas Golden Knights goaltender Robin Lehner as he is held back by defenseman Nick Holden during the first period of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Paul Chiasson/The Canadian Press via AP)

Vegas Golden Knights' Nicolas Roy (10) celebrates his game-winning goal against the Montreal Canadiens with teammate Max Pacioretty in overtime of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Graham Hughes/The Canadian Press via AP)

Montreal Canadiens' Paul Byron (41) and teammate Cole Caufiled (22) move in on Vegas Golden Knights goaltender Robin Lehner during the second period of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Graham Hughes/The Canadian Press via AP)

Vegas Golden Knights' Nicolas Roy (10) celebrates his game-winning goal against the Montreal Canadiens with teammates in overtime of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Graham Hughes/The Canadian Press via AP)

Montreal Canadiens' Paul Byron celebrates his goal as Vegas Golden Knights goaltender Robin Lehner looks on during the second period of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Paul Chiasson/The Canadian Press via AP)

Vegas Golden Knights' Max Pacioretty is taken out by Montreal Canadiens defenseman Ben Chiarot as goaltender Carey Price snags the puck during the first period of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Paul Chiasson/The Canadian Press via AP)

Montreal Canadiens replacement coach Luke Richardson gives instructions during a break in play against the Vegas Golden Knights during the second period of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Paul Chiasson/The Canadian Press via AP)

Vegas Golden Knights' Nicolas Roy (10) celebrates his game-winning goal against the Montreal Canadiens with teammate Max Pacioretty in overtime of Game 4 in an NHL Stanley Cup playoff hockey semifinal in Montreal, Sunday, June 20, 2021. (Graham Hughes/The Canadian Press via AP)