"We weren't as crisp as we usually are," Golden Knights coach Gerard Gallant said. "We mishandled a lot of pucks, we weren't as sharp as usual. We looked OK at times, and we looked like we had some good pressure. But for the most part, the execution wasn't there tonight like it usually is."
The Golden Knights head into the All-Star break atop the Pacific Division, nine points ahead of the San Jose Sharks. Vegas has 32 wins, one shy of tying the NHL record for most victories by an expansion team held by the 1993-94 Florida Panthers and Mighty Ducks of Anaheim.
"It's disappointing after tonight," Fleury said. "But if you look at since the beginning of the season, I think we can be proud of our team to be where we're at right now. It's fun to be a part of it."
Halak helped the Islanders survive early with some key saves, including a glove save on a breakaway attempt from Brendan Leipsic.
"They got an ear full between the first and second, but the response was unreal," Islanders coach Doug Weight said. "We frustrated them and hopefully we can look back and say this vaulted us somewhat."