Tottenham's hopes of Champions League qualification took a big blow as they lost 1-0 to the Cottagers thanks to Berbatov's second-half poke past Hugo Lloris.
The 52nd-minute strike was not one of the finest of his career, but it did not matter for Berbatov or Jol, who tasted victory over the club he used to manage for the first time since leaving White Hart Lane in acrimony six years ago.
Berbatov has now racked up 10 goals for Jol this season, and he was so confident that he would secure a shock victory for the west London club that he told his manager he would do before the match.
Jol said: "Before the game you hope for a point... but Berbatov came to me and promised me... He said: 'you have to trust me'.
"I thought he was joking. But he said it before the match against Stoke (where he scored the winner) and he is a wonderful player.
"It was one of the best wins ever."