Tottenham manager Jose Mourinho has questioned the mental strength of his team after their dismal 3-1 loss at Sheffield United on Thursday.
Spurs' Champions League hopes were left in tatters after the defeat at Bramall Lane, which was underpinned by a poor reaction to a controversial video assistant referee call.
Harry Kane had a goal disallowed after Lucas Moura was adjudged to have handled the ball in the build-up after being fouled and Mourinho's side capitulated afterwards.
The Portuguese said he learned a lot about his players by their poor reaction.
"I don't understand why we didn't get a free-kick, maybe it is because we played through but I think he has to give the goal.
"Where is Lucas supposed to put his hands. It is a goal in my opinion.
"When you concede a goal and equalise so quickly it is a good feeling, but it is disallowed, it's really mixed feelings."