On a night when Paris Saint-Germain recorded a last-gasp victory over Lyon, the biggest talking point at the Parc des Princes was Lionel Messi's second half substitution. With 75 minutes on the clock and the score tied at 1-1, Mauricio Pochettino chose to substitute the Argentine and bring on Achraf Hakimi.
As he walked towards the bench, Messi exchanged words with Pochettino, with his face bearing a puzzled expression.
Although he had been his side's best performer in the first half, the 34-year-old struggled to influence proceedings during the second half.
Nevertheless, his substitution and his reaction to it are set to be the subject of significant discussion over the coming days.