LONDON, ENGLAND - DECEMBER 23: Referee Lee Mason (L) and Assistant Referee Constantine Hatzidakis (R) walk out of the tunnel with bubbles floating around them during the Premier League match between West Ham and Newcastle United at London Stadium on December 23, 2017, in London, England. (Photo by Serena Taylor/Newcastle United via Getty Images) *** Local Caption ***Lee Mason;Constantine Hatzidakis;