Lisandro Martinez's deflected winner offered some respite to Amorim, who has won just four of his 12 Premier League games in charge.

Coach Erik ten Hag insisted last season could have turned out very differently had injuries not hindered Manchester United's progress, but further setbacks ahead of the new campaign have dampened the mood around Old Trafford once again.

Manchester United defender Lisandro Martinez will be sidelined for eight weeks with a knee injury sustained in Sunday's 3-0 home win over West Ham United, the club said on Monday.

Manchester United have been hit by a double defensive injury blow after Lisandro Martinez was ruled out for the rest of the season and Raphael Varane sidelined for the next few weeks.

 Manchester United manager Erik ten Hag tried to stay positive about the injury suffered by defender Lisandro Martinez during the 2-2 Europa League draw with Sevilla on Thursday.

Lisandro Martinez has completed his transfer from Dutch side Ajax Amsterdam to Manchester United with the Argentine defender signing a five-year contract, the Premier League club said on Wednesday.

Manchester United have reached a deal with Eredivisie champions Ajax Amsterdam to sign Argentine central defender Lisandro Martinez for 45 million pounds ($53 million), the BBC reported on Saturday.