If Mohamed Salah's injury is serious, it wouldn't be good for Liverpool. Losing their best players in a mid-season African Cup will end their leadership joy. Hamstring injuries can be serious.
The moment Liverpool make a mistake, Manchester City take the lead and never let it go. From then on, the balance in the Premier League will not change easily. City had given other teams enough advances. Liverpool and Arsenal couldn't use this well. They needed to collect more points. City with De Bruyne won't lose points easily anymore.