Two options for me:
1) Full steam ahead, same again, hope its a Barca rather than a Leicester/Everton. Toure in a 2 man midfield. Blind hope that our system works. (Bold prediction: it won't).
2) Play 20 yards deeper, play Kompany and Ottamendi. Sagna right back. Left-back is a disaster whoever plays. Fernando, Toure, Silva right in the middle. Sterling, Sane wide and KDB though the middle. Play patiently. Don't concede in first two minutes. Compete in midfield. Play deep and compact. Attack when there is space. Play direct and keep players behind the ball.