Antonio Conte insists he will keep working to eradicate the inconsistency that has plagued Tottenham's season.
Spurs were beaten 1-0 by Middlesbrough on Tuesday night as their last remaining hope of silverware was extinguished.
Conte hit out at his team's poor finishing but accepted the Championship side were worthy winners, teenager Josh Coburn smashing the only goal in the second half of extra-time to book their place in the quarter-finals.
'In this type of game you have to know the difficulty and you have to kill, in a sporting way, your opponent quickly,' said the Spurs boss.