Tottenham manager Mauricio Pochettino was despondent after Spurs could only manage a 2-2 draw with Swansea City at Liberty Stadium on Sunday.
Danish playmaker Christian Eriksen scored two free-kicks to bring the scores level, the first after Andre Ayew opened the scoring for the Swans and the second after Harry Kane's own goal, but neither side could find a winner.
"We scored from two free-kicks, fantastic from Christian Eriksen, but the easier chances, we didn't score," the Argentine boss said.
"We're ambitious and want to win all games and when we have the opportunities, we need to have more of a killer instinct.
"I'm a little disappointed and it's a little of the same feeling I had after Monaco," he added, referring to their 1-1 draw in the Europa League on Thursday. "Perhaps even worse today because in the first half they had one effort on target and scored twice.
"We created lots of chances, completely dominated the game but that's football, we need to accept it. We have to be proud of our players because the effort was brilliant and to play like that three days after Monaco was fantastic."