Nhl

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Nashville Predators forward Gabriel Bourque, left, has his shot blocked by Colorado Avalanche goalie Semyon Varlamov (1), of Russia, as defenseman Jan Hejda (8), of Czech Republic, tries to clear the puck away in the first period of an NHL hockey game on Tuesday, March 25, 2014, in Nashville, Tenn. (AP Photo/Mark Zaleski)

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Nashville Predators defenseman Shea Weber (6) checks Colorado Avalanche center Nathan MacKinnon (29) into the boards in the second period of an NHL hockey game on Tuesday, March 25, 2014, in Nashville, Tenn. (AP Photo/Mark Zaleski)

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Nashville Predators goalie Pekka Rinne (35), of Finland, gloves a shot by Colorado Avalanche left wing Jamie McGinn (11) as he is defended by forward Viktor Stalberg (25), of Sweden, in the second period of an NHL hockey game on Tuesday, March 25, 2014, in Nashville, Tenn. (AP Photo/Mark Zaleski)

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Dallas Stars center Dustin Jeffrey (11) keeps Chicago Blackhawks right wing Ben Smith (28) and Brandon Saad (20) from the puck during the second period of an NHL hockey game Tuesday, March 25, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)

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Dallas Stars center Tyler Seguin (91) falls to the ice between Chicago Blackhawks right wing Kris Versteeg (23) and Marian Hossa (81) during the first period of an NHL hockey game Tuesday, March 25, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)

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Chicago Blackhawks rookie Teuvo Teravainen, from Finland, skates during the first period of an NHL hockey game against the Dallas Stars Tuesday, March 25, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)

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Chicago Blackhawks rookie Teuvo Teravainen (86) from Finland, skates again Dallas Stars center Shawn Horcoff (10) during the first period of an NHL hockey game Tuesday, March 25, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)

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Dallas Stars goalie Kari Lehtonen (32) makes a save on a shot by Chicago Blackhawks center Jonathan Toews (19) as Jordie Benn (24) also defends during the first period of an NHL hockey game Tuesday, March 25, 2014, in Chicago. (AP Photo/Charles Rex Arbogast)