Just as Chelsea were flying high, Tottenham came along and clipped their wings.
They did so with their not-so-secret weapons on the flanks in Danny Rose and Kyle Walker u2012 two of the best full-backs in European football.
You will have a tough time finding a better player in the Premier League in their positions and Mauricio Pochettino knows it. Antonio Conte does too.
Chelsea went to White Hart Lane with 13 consecutive wins behind them but left with nothing after two goals from Dele Alli, who naturally dominated the headlines.