Manchester United’s players may be struggling under the pressure of playing for the 20-time English champions, says manager Jose Mourinho.
Sunday’s 3-1 defeat at Premier League rivals Watford means United have lost their past three matches.
“Some individuals probably feel the pressure and responsibility too much,” said former Chelsea boss Mourinho.
“We started the season very well. But was I thinking that my team was ready, perfect, unbeatable? Not at all.”
He added: “I was completely aware that we were not perfect, with lots of players who are not end products and can make their own mistakes.”
Mourinho has lost three consecutive games in a season for the first time since February 2002, when he was Porto boss.