These teams feature some of the world's best skaters, but goaltending will be the key for both. Washington's Philipp Grubauer has come in and played exceptionally well. He's forced coach Adam Oates' hand to keep playing him. Both Michal Neuvirth and Braden Holtby earned their right to be in the NHL, no question about it. They were both excellent down in Hershey of the American Hockey League when they were there, and Holtby has had huge playoff runs for a young goalie.
But all three Capitals goaltenders are young, and part of being a young goalie is finding that consistency in the League. I know firsthand it's difficult to achieve. Grubauer has come in and outplayed Neuvirth and Holtby, and for now he is the guy.
The Capitals need great goaltending, as does any team. Because Washington really excels on the power play and is so skilled, their 5-on-5 play is even more critical, and their goalie needs to make the saves that allow them to play to their skill set.