Tottenham's winless run has been extended to four matches and Jose Mourinho can be content with a goalless point away to Watford.
His team's loss, the third in a row, was saved by goalkeeper Paolo Gazzaniga, who saved Troy Dini's penalty in the 70th minute.
Tottenham was sterile and harmless, without a classic striker, but in the 92nd minute they were able to win - Puseto kicked the ball from the goal line that was sent by Lo Celso from the crowd.
Video technology showed that the ball was no more than an inch on the line.
"Spurs" have 31 points, they are far from the Champions League zone, and even further from the real game.
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