Ole Gunnar Solskjaer admits Liverpool and Everton have an advantage over their Premier League rivals because the two Merseyside clubs are allowed fans at Anfield and Goodison Park.
United were hoping to welcome 2,000 supporters back to Old Trafford for Sunday's clash with Leeds, but the Government's decision to keep Manchester in tier three means that is no longer possible.
Liverpool remains in tier two as Jurgen Klopp's side and Carlo Ancelotti's Everton battle with United for places at the top of the table. Third-placed Southampton and Brighton are the other Premier League clubs able to have fans.