Fans watch during the third period of an NHL hockey game between the Dallas Stars and the Chicago Blackhawks in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Chicago Blackhawks left wing Brandon Hagel (38) celebrates with teammates after scoring during the first period of the team's NHL hockey game against the Dallas Stars in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Chicago Blackhawks left wing Alex DeBrincat celebrates after scoring a goal during the first period of an NHL hockey game against the Dallas Stars in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Chicago Blackhawks goaltender Kevin Lankinen, left, makes a save on a shot by Dallas Stars defenseman Mark Pysyk during the second period of an NHL hockey game in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Dallas Stars defenseman Andrej Sekera, left, works for the puck against Chicago Blackhawks center Adam Gaudette during the second period of an NHL hockey game in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Chicago Blackhawks goaltender Kevin Lankinen (32) makes a save on a shot as Dallas Stars left wing Joel Kiviranta (25) battles for the puck against Chicago Blackhawks defenseman Connor Murphy (5) and right wing MacKenzie Entwistle (58) during the first period of an NHL hockey game in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Chicago Blackhawks defenseman Nikita Zadorov, left, works for the puck against Dallas Stars center Radek Faksa during the second period of an NHL hockey game in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)

Dallas Stars defenseman Jamie Oleksiak, right, works for the puck against Chicago Blackhawks left wing Dominik Kubalik during the first period of an NHL hockey game in Chicago, Sunday, May 9, 2021. (AP Photo/Nam Y. Huh)