Tottenham Hotspur's Argentinian head coach Mauricio Pochettino (R) shakes hands with Tottenham Hotspur's English midfielder Dele Alli as he is substituted during the English Premier League football match between Tottenham Hotspur and Chelsea at White Hart Lane in London, on January 4, 2017.
In-form midfielder Dele Alli scored two near-identical headers as Tottenham Hotspur beat Chelsea 2-0 on Wednesday to torpedo the Premier League leaders' hopes of a record 14th consecutive victory. / AFP / IKIMAGES / IKIMAGES / RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications.        (Photo credit should read IKIMAGES/AFP/Getty Images)