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Ottawa Senators' defenseman Erik Karlsson (L) vies with Anaheim Ducks' defenseman Brandon Montour during a 2017-2018 NHL hockey game in Anaheim, the United States, on Dec. 6, 2017. Anaheim Ducks won 3-0. (Xinhua/Zhao Hanrong)
Ottawa Senators' defenseman Erik Karlsson (L) vies with Anaheim Ducks' defenseman Brandon Montour during a 2017-2018 NHL hockey game in Anaheim, the United States, on Dec. 6, 2017. Anaheim Ducks won 3-0. (Xinhua/Zhao Hanrong)