Liverpool boss Jurgen Klopp said his players had made “massive mistakes” in the 7-2 thrashing at Aston Villa, adding “a game like tonight should not happen”. Klopp’s Premier League champions were left stunned as Ollie Watkins registered a first-half hat-trick and John McGinn, Ross Barkley and Jack Grealish, with a brace, also got on the scoresheet for Villa. The hosts, who led 4-1 at half-time, did not look back after going 1-0 up through Watkins in the fourth minute as they punished an error by Reds goalkeeper Adrian.