It's not clear which goalie will start for the Dallas Stars in a pivotal Game 4 of their Western Conference semifinal series.

It's also not clear if it will matter the way the St. Louis Blues are playing.

The Blues have been tough to handle for Antii Niemi and Kari Lehtonen, and one of those players will be in the crosshairs Thursday night in St. Louis.

The Blues took a 2-1 series lead with Tuesday's 6-1 rout in their first home game in this series. Niemi got his first start of the series after he was effective in Game 2 by stopping 19 of 20 shots in relief of Lehtonen.

Alexander Steen and David Backes had two goals apiece for St. Louis. Vladimir Tarasenko had a goal and two assists after going three straight games without a point, and Troy Brouwer had a goal and an assist in the Blues' first win this postseason by more than one goal.

Brian Elliott was sharp Tuesday for St. Louis with 25 saves. The Blues have killed off all 11 Dallas power plays in the series while scoring four times in the last two games with the man advantage.