Liverpool could lose some big players this summer but Paul Merson believes it’s imperative they keep two first-teamers if Mo Salah leaves. The Reds will be in for a summer of change as Jurgen Klopp jets off into the sunset after his last game at Anfield next weekend. For now, though, there is the task of preparing to face Aston Villa on Monday, while further down the line, Liverpool need to plan for the summer. Amongst those plans will be who stays, who goes, and who comes into the club. And with forward Mo Salah being linked with a move away from the club, Paul Merson believes there are two m…