#1 The introduction of Thiago Alcantara
A few months down the line, many of us may forget the opening 30 minutes of this game - a phase when it all looked positive for Spurs, as they ran the races, moved the ball about a little better and enjoyed more fluency.
They were clearly the better side, with the physically-laden midfield trio of Sissoko, Harry Winks and Tanguy NDombele proving too muscular for the two-man pivot comprising of Kimmich and Corentin Tolisso.
It was however, all bound to change with the introduction of the effervescent Thiago Alcantara. The Spaniard ran the pace of the game, absorbed the press and brought about the idea of order and calm in midfield.
He led the play by starting attacks, showing immaculate composure on the ball and playing around Tottenham's press.
It was then of no surprise that Philippe Coutinho, who endured an indifferent evening, enjoyed far more touches than he did in the first 45 minutes.