Manchester City are certainly very happy to hear this news and hope that Mohammed Salah will be absent for quite a long time. They can more easily take advantage of Liverpool's current situation and at any time can displace Liverpool at the top of the standings. De Bruyne's return is an improvement in performance for Manchester City and the absence of Mohammed Salah will be a disaster for Liverpool.
Salah's predicted injury is a hamstring injury. I think it won't be too serious. In the short term, the Egyptian team will be directly affected if Salah is absent. As for Liverpool, their schedule this January is not too heavy, they only have to play one match in the Premier League against Bournemouth.
That's why Liverpool can completely give Salah the right to rest in the next few weeks if he is unfortunately injured. The Premier League championship race still has a long way to go. This is just a temporary shortfall for Liverpool. Mancity should not be too hasty to rejoice and lose focus.
this is what Klopp is worried about if his mainstay players go to defend their country but return to their team injured and even all the coaches certainly dont want this to happen but according to my predictions, one day Liverpool will experience problems and Man City will reclaim the top of the standings.
Indeed, in this news there is no strong confirmation whether Salah suffered a serious injury or only a minor injury, but looking at his condition when he suffered the injury, it seems that Salah was not too serious.
Indeed, Man City should not be too happy to hear this news, but the fact is that if Liverpool plays in the upcoming match without Salah presence, it will definitely be a very tough match because on the one hand, as @rendravolt said, Man City has again received strong support from KDB who has recovered and was able to provide success in every match to secure 3 scores.
so even though this news has not been confirmed, these two teams must be careful in fighting for the EPL title this season, even though Liverpool will appear without Salah, Klopp should have another strategy to stay at the top of the EPL and also Man City must be careful not to underestimate Liverpool too much even without with Salah, Klopp usually has a great strategy to maintain his position.