ST. LOUIS — Roman Polak broke a broke a third-period tie, and David Perron scored twice to help the St. Louis Blues beat the Stanley Cup champion Blackhawks 4-2 on Friday.Patrik Berglund also scored, T.J. Oshie had two assists and Jaroslav Halak stopped 23 shots as the Blues avenged a 3-2 overtime loss in the United Center Monday night.Patrik Sharp and Brent Seabrook scored for the Blackhawks. Marty Turco stopped 24 shots in the loss that snapped Chicago’s winning streak at four. Polak’s shot from the right circle with 8:59 left in the third appeared harmless, but found its way through Turco, with the Blues’ David Backes setting a screen in the crease.Perron opened the scoring at 6:31 of the first, finishing off Oshie’s feed after Duncan Keith’s giveaway behind the goal.Sharp tied it with a one-timer from the high slot 13 seconds into a power play, a shot over Halak’s right shoulder 10:13 into the first period.Perron, scored his second of the game 6:12 into the second period, converting another pass from Oshie with a backhander past Turco.However for the second time, the Hawks got the equalizer when Seabrook’s point shot caromed off Oshie’s stick and hopped over Halak just as a penalty to the Blues’ Erik Johnson expired at 9:35 of the second.Halak preserved a 2-2 tie with a key stop on Jonathan Toews from the slot early in the third period. Berglund iced the game by scoring with 1:03 to play, a power-play goal from the crease.

NOTES—Perron has four goals this season, all in the last two games. … Sharp has six goals in the last five games. … Oshie has at least a point in five straight games. … IndyCar and NASCAR driver Danica Patrick dropped the ceremonial first puck. … The Blues honored Hockey Fights Cancer Awareness Night by wearing pink laces on their skates. … The Blues have played the Blackhawks more than any other team. Friday was the 271st meeting between the teams.