BBC SPORT
Manchester United defender Lisandro Martinez is expected to be out for two to three months with a foot injury.
The 25-year-old Argentina international missed the end of last season after fracturing a metatarsal in April.
He returned to action at the start of this season but United say he will be sidelined again because of “an aggravation” to the injury.
The club said Martinez “experienced the setback in our Premier League game against Arsenal earlier this month”.
“It has now been determined that he needs a period on the sidelines for recovery and rehabilitation.
“Assessment is ongoing to determine next steps.”
Martinez played against Wolves, Tottenham and Nottingham Forest before facing Arsenal in a 3-1 defeat by the Gunners on 3 September.
He went on to play in losses against Brighton and Bayern Munich but then missed wins against Burnley and Crystal Palace.
Martinez joined United from Ajax last July in a deal worth up to £57m and helped them finish third in the Premier League and win the League Cup.
