Ovechkin led the league with four goals, six points, three power-play goals, five power-play points and 24 shots on goal.
Eller factored in five of Montreal's seven goals, tying for second in the league with three goals and five points as the Canadiens split their opening two games.
Fleury posted a 2-0-0 record with a 0.50 goals-against average, .979 save percentage and one shutout as the Penguins opened the season with a pair of victories.
The Toronto Maple Leafs have called up Jamie Devane and Trevor Smith from the AHL Marlies.
Devane, 22, made his NHL debut on Saturday in a win against Ottawa and was then was send back to the Marlies for Sunday's game against Lake Erie.
Smith, 28, joined the Leafs organization this season after spending time with the Islanders, Lightning and Penguins.