The North London outfit have often allowed a lead to slip through, although on many occasions they have successfully staged comebacks.
Back in January, Spurs conceded two late goals to Leicester City at White Hart Lane to lose the FA Cup fourth-round tie 2-1.
Andros Townsend had given Tottenham the lead from the penalty spot in the 19th minute, but Mauricio Pochettino’s side shipped in two goals in the final seven minutes.
Tottenham will take on Leicester at home in the Premier League on Saturday, and ahead of the encounter Vertonghen has highlighted the importance of not giving up a one-goal advantage.
"I didn’t play in the FA Cup tie but I remember we were in control and then they hit us with two late goals,” the Belgium international told Tottenham’s official website.
"That’s one area we can improve - you have to kill games like that when you are 1-0 up and creating chances, score a second goal and to keep a clean sheet, and that’s our responsibility at the back. That takes the pressure off.”
Vertonghen has highlighted an area that Tottenham need to improve on, or else they could fall further away from the top four.
Although Spurs have shown time and time again this season that they can come back, they simply cannot afford to rely on late goals anymore.
Maybe when Tottenham go a goal up, they can adapt their approach and play a less high-pressing game.