Goaltending could cost Sharks

Antti Niemi's save percentage has left something to be desired this postseason. Jamie Sabau/Getty Images

Through two rounds, the four conference finalists in this year's playoffs have appeared to be invincible. All have faced close contests, with the Bruins, Lightning and Canucks winning tight first-round series by a single game, and the Sharks overcoming a challenging Detroit Red Wings comeback in the second round. Despite their collective success to date, none of these teams is perfect, and it's worthwhile for us to try to discern where each franchise's potentially fatal weakness lies.

Boston Bruins

The Bruins barely even looked inconvenienced during a second-round rout of the Philadelphia Flyers. Perhaps even more remarkable than the victory is the fact that it happened with almost no help from their power play.