It was an incredible 16th loss in 30 Premier League matches this season for Tottenham, but the damage of the 0-1 defeat at Stamford Bridge could be far-reaching for the North London club and their boss Ange Postecoglou. What happened? In the 64th minute, Chelsea had taken the lead just after half time thanks to Enzo Fernandez, and Postecoglou decided to make a couple of changes. One of those was to bring on Pape Sarr for Lucas Bergvall and it seemingly didn’t go well with the Spurs fans in the away end. The fans serenaded their Australian coach with a chant of “You don’t know what you’re doing”. In the 69th minute, Sarr wins the ball from Moises Caicedo in the midfield and fired in a long-range effort on goal that squirmed past Chelsea’s erratic gloveman Robert Sanchez. Spurs began celebrating but immediately the Chelsea players surrounded the referee Craig Pawson, pointing to a possible foul on Caicedo. In the meantime, Postecoglou appeared to face the Spurs fans and cup his hand to his ear. …