Vegas Golden Knights' forward David Perron (C) vies with Los Angeles Kings' forward Tyler Toffoli (L) and defenseman Alec Martinez during the Game 4 of an NHL hockey first-round playoff series in Los Angeles, the United States, April 17, 2018. Vegas Golden Knights won 1-0 in the game and won the series 4-0. (Xinhua/Zhao Hanrong)