By Grey Whitebloom Earlier this season, Mauricio Pochettino quite rightly said: “Football is a game of mistakes.” The Argentine’s calamitous Chelsea side have done their best to prove him right but Arsenal and Liverpool delivered plenty of supporting evidence themselves on Sunday afternoon, with both teams benefitting from bone-headed blunders. Arsenal managed to come out on top in a truly chaotic contest, winning 3-1 to reignite their tilt for the Premier League title. Bukayo Saka’s opener ensured that the Gunners have scored the first goal in each of their last four league matches against Li…