Tottenham Hotspurs manager Mauricio Pochettino has admitted his frustration and disappointment after Spurs lost their fourth home game of the season to Stoke City.
Two goals by former Barcelona star Bojan Krkic and Jonathan Walters before the half time secured the three points for the Potters, despite Nacer Chadli reduced the deficit in the 78th minute before Kyle Naughton's late dismissal.
Having only secured 14 points from the 11 first Premier League games of the season, under-fire manager Pochettino expressed his disappointment just after the match.
"I am quite unhappy and disappointed with the performance and the result. I have to balance my emotions," he said.
"When you lose you are unhappy and you put the pressure on yourself. We need to find the solution; this is my job in the next few weeks and change our mentality."
Pochettino handed youngster Harry Kane his first Premier League start of the season, with both Emmanuel Adebayor and Roberto Soldado starting on the bench.
The young striker responded to the manager's confidence earlier in the game, with a good header following an Andros Townsend's cross.
"We need to find the solution. At the start we created a big chance from Harry Kane but after we conceded and we started to play uncomfortably. We made rash decisions. We concede the second goal and in the first half we played no good.
"It is clear if you see the result we need to improve a lot. In football you need time but you never get a long time."
"We took rash decisions and looked uncomfortable on the ball and made a lot of mistakes."
The Argentinian manager took off Townsend and Christian Eriksen at half time replacing them with Mousa Dembele and Erik Lamela. But even though Spurs improved they could not avoid another defeat.
"We were more comfortable in the second half but then 2-0 down it is difficult", the Argentine said.
"We scored but in the end it was a very disappointing result and in the next few days we will try to find a solution and change our mentality."