Luke said he's in constant competition with Alex and relishes those moments.
"When it comes to the weight room, on ice, and practice in the summer, we're getting into quite a few fights, whether it's competing or him telling me to do something that I don't like," he said. "I'm not shy to mix it up with him, but it's all in good spirits."
Luke said the Golden Knights have a good chance of winning the Stanley Cup, though Vegas trails the Dallas Stars 1-0. Game 2 of the best-of-7 series in Edmonton, the hub city for the conference finals and Stanley Cup Final, on Tuesday (8 p.m. ET; NBCSN, CBC, SN, TVAS).
"I think obviously what they're all working toward is the Stanley Cup, and that's definitely one of the goals of mine when I reach the League," he said. "It motivates me, for sure, to see my brother out there and what he's been able to do."
Luke's roommate is freshman Drew Commesso, No. 2 in NHL Central Scouting's final ranking of North American goaltenders eligible for the 2020 NHL Draft, to be held virtually Oct. 9-10. It was postponed from its initial date of June 26-27 due to concerns surrounding the coronavirus.
"We're starting workouts soon and we'll be on the ice," Tuch said. "Hopefully, the season starts in November.
"I think the time with my family, sitting in front of the TV and hearing my name called will be special. I think it's been a long couple of months. I've been waiting for this moment for a while now, so sharing that moment with my brother, my sister, my parents, will definitely be special."