LAS VEGAS (AP) – The Vegas Golden Knights have advanced to the Stanley Cup semifinals with four straight wins over the Colorado Avalanche following back-to-back losses. Alex Pietrangelo scored his first goal of the postseason to put the Knights ahead to stay in a 6-3 downing of the Avalanche. Pietrangelo’s 46th shot of the playoffs found the back of the net with 18 seconds left in the second, breaking a 3-3 deadlock. Marc-Andre Fleury made the lead stand up by making 11 of his 30 saves in the final period. Fleury’s 89th career playoff win leaves him all alone in fourth on the NHL’s all-time list. Nick Holden, William Karlsson, Keegan Kolesar and William Carrier also scored for the Knights before Max Pacioretty added an empty-netter. The Golden Knights next face the Canadiens, who come off a four-game sweep of Winnipeg and have won seven in a row. Game 1 is Monday in Las Vegas.