Erik Ten Hag even if he fails to qualify Manchester United for the Champions League next season would still not be sacked no matter how they do it.
The club has said they will support his decisions to get a new defending defender to support the defense since Lisandro Martinez has been brutally Injured and that energy and aggression he brings into the squad is no more.
Ever since Lisandro Martinez got Injured during the game against Sevilla, Manchester United defense has never been the same. Not even Lindelof, Harry Maguire or Jonny Evans comes close to Lisandro.
I can't speculate about next season because I think it depends on Ten Hag achievements at the end of the season but Champions League tickets might be a consideration I mean if he fails then he might be fired and the only way to stay at Manchester United is to get a Champion league ticket. Apart from that, there are rumors that Manchester United will have a new owner next season well, if the rumors are true then the new owner will change the composition of the players including the coach so let Ten Hag end this season first.