By John Cross Manuel Akanji has told Trent Alexander-Arnold to keep his mouth shut until Liverpool win the Treble. Alexander-Arnold stoked up the tension between the title rivals by claiming Liverpool’s trophies mean more than Manchester City’s success. It has raised the stakes in the three-horse title race with Akanji clearly unhappy about Alexander-Arnold’s remarks which suggested City’s spending power has turned them into a “winning machine.” City boss Pep Guardiola has won 14 trophies during his reign at the Etihad, including the Treble last season and a total of five trophies as they also…