Luke Shaw branded Manchester United's failure to beat Arsenal as unacceptable after they dropped more points in the title race.
Three days after losing to bottom-of-the-table Sheffield United, Ole Gunnar Solskjaer's side were held to a goalless draw at the Emirates despite creating the better chances.
Edinson Cavani, in particular, was guilty of two glaring misses in the second half as United fell three points behind leaders Manchester City who have a game in hand.
'We didn't look like we wanted to play,' said Shaw.