Jose Mourinho has confirmed Ashley Young and Timothy Fosu-Mensah will miss the rest of the season through injury, but says Manchester United have no fresh concerns ahead of the second leg of their Europa League semi-final against Celta Vigo on Thursday.
Young was substituted 11 minutes into United's 1-0 first-leg victory over Celta last week after suffering a hamstring injury, to be replaced by Henrikh Mkhitaryan.
Further tests show the problem will bring the 31-year-old's term to a premature end, as the England international continues his recovery.
Fosu-Mensah will also sit out the remaining four fixtures with Premier League games against Tottenham, Southampton and Crystal Palace to come.
The injured pair join the club's top scorer Zlatan Ibrahimovic and defender Luke Shaw in missing the end of the term.
Ibrahimovic's season came to an abrupt end when he sustained a cruciate ligament injury during his side's 2-1 Europa League win over Anderlecht in April, while Luke Shaw damaged foot ligaments during a 1-1 draw with Swansea.