I can only assume if found not guilty of the other 2 crimes that he will then counter sue for lost career earnings...
I doubt that very much. Bear in mind the differing burden of proof in civil and criminal proceedings. The burden in the criminal courts, beyond all reasonable doubt, is considerably higher than in the civil courts, where cases are decided on the balance of probabilities.
Given the CPS believed, as they have to in order to charge a suspect, that there was a realistic prospect of a conviction, then regardless of the acquittal it seems almost inconceivable that a civil court would decide in Mendy’s favour on the balance of probabilities. It would be a very courageous civil lawyer who takes a client on in these circumstances.