West Ham suffered a 4-1 defeat to Tottenham in the London derby at White Hart Lane.
Former Spurs midfielder Jenas was following the match, and he was not impressed with the defending for Harry Kane’s second goal of the match in the 50th minute.
"Slaven Bilic will be disgusted with that,” Jenas told BBC Sport after Spurs scored their third goal. “A little bit of a reshuffle at the break and then over-playing in the wrong area.
“I'm not sure what James Tomkins is thinking there, it's a good shot from Harry Kane but Adrian should do a lot better, too.”
West Ham were never in the game, and perhaps they were lucky not to lose the Premier League encounter by a bigger margin than 4-1.
Slaven Bilic’s side are sixth in the league table at the moment with 21 points from 13 matches, three points behind Tottenha, who are currently fifth.
Over the course of the 90 minutes at White Hart Lane, West Ham had 44% of the possession, took 10 shots of which four were on target, and earned six corners.