On an evening when the four teams from Group D could qualify, Spurs stared for the barrel at half-time after Chancel Mbemba’s header on the interval shot.
At the time, Antonio Conte’s side were destined for the Europa League, with their manager helpless in the stands after a red card in last week’s clash with Sporting Lisbon.
A stirring second-half comeback, however, ensures Spurs will play the highest level of European football after the World Cup break later this month.
Lenglet’s first goal for the club came in what is becoming a trademark to improve Spurs’ second-half performance before Pierre Emile-Hojbjerg sealed their status at the top with the final kick Match.
“We didn’t play well in the first half maybe because we didn’t know if we should attack or defend and maybe it wasn’t good to play that type of first half,” Lenglet told BT Sport.
“After talking in the locker room and saying what we have to say, we started the second half with more power and more personality to go and score and we played a very, very good second half.
“I’m happy to score here, more for the team and we needed a point and it’s very important to win this type of match. I’m happy because it’s an important goal for the team.”