Nathan MacKinnon of the Colorado Avalanche (Credit: Getty Images)The Vegas Golden Knights took a 1-0 series lead in the Western Conference Final with a 4-2 win over the Colorado Avalanche in NHL Game 1. Colorado Avalanche captain Nathan MacKinnon got some attention with his visible frustration during post-game interviews after the loss. The result also raised questions about Colorado’s execution, urgency and ability to respond under playoff pressure ahead of a pivotal Game 2 matchup.The Colorado Avalanche entered the Western Conference Final with tremendous momentum after dominating the earlier rounds of the playoffs. But the Vegas Golden Knights had the critical moments in Game 1, with goaltender Carter Hart delivering one of his best playoff performances. Nathan MacKinnon frustration grows after Colorado Avalanche NHL Game 1 defeatNathan MacKinnon was frustrated as the Colorado Avalanche had trouble executing and fell behind early against the Vegas Golden Knights.The Vegas Golden Knights scored the first three goals of the NHL Game 1 to put Colorado in a tough comeback situation. The Avalanche came hard in the third but couldn’t capitalise on their chances. Nathan MacKinnon spoke with reporters, looking frustrated, and repeatedly blaming bad execution for the loss.Colorado Avalanche head coach Jared Bednar also had problems with his team’s urgency after the game. Against a team like the Vegas Golden Knights, a veteran playoff team, you’ve got to be ready to go from the start, and we didn’t have that intensity early', he said.Vegas Golden Knights goaltender Carter Hart had a huge hand in the victory, making 36 saves in critical moments. His performance was critical to how Vegas held off a late charge of Colorado’s offence for a huge road win in the Western Conference Final.It was Colorado’s first real stumble in the playoffs this postseason, which added to the pressure going into NHL Game 2.Another question mark for Colorado Avalanche fans is the status of defenseman Cale Makar, who was ruled out of Game 1 with an undisclosed injury. His potential return could be a huge factor in swinging momentum back to Colorado in the series.NHL news roundup talks still center around Nathan MacKinnon’s visible frustration and if the Colorado Avalanche can bounce back quickly enough before the series shifts further in favour of Vegas.