Cape Town - Manchester United manager Louis van Gaal has confirmed that defender Marcos Rojo has suffered a dislocated shoulder after being stretchered off in yesterday's Manchester Derby at the Etihad Stadium.Rojo was stretchered off early on in the second half after falling awkwardly on his shoulder and needed gas and air when being taken off the pitch."The shoulder is out, so you never know how long that takes," Van Gaal told Sky Sports. "I have to wait until tomorrow but he shall not play against Crystal Palace."Despite United's injury list slowly beginning to grow, Van Gaal is refusing to panic."We have injuries but we still have 11 players to play and they are very good players," added van Gaal.