Since Manchester United has extended the contract with the current manager for one more season, if Manchester United wants to end the contract with this manager at the beginning of the season, then the manager will have to pay the full season. It can certainly be called a financial loss for any club.
Yeah even if they decided to fire him is still at his own advantage because since they have extended his contract that means that he is entitled for full payment even if he was sacked by the club without finishing the additional one year contract, so the financial lost will be on the club and right now is the kind of lost Manchester United management is not ready to pay, so they are ready to accept any result they will get on this season from the coach because they have no option, well we just hope that the money Manchester United management spent on extending his contract never go in vain because already is obvious they will not be competitive but he should at least make a little positive change on the club, so that at least his contract extension will have a little significant.