Gareth Bale's penalty was Tottenham's only shot on target in the first half
Tottenham boss Jose Mourinho questioned the attitude of some of his players as Spurs drew 3-3 at LASK to progress to the Europa League knockout stages.
Substitute Dele Alli put Spurs ahead from the spot before Mamoudou Karamoko curled past Joe Hart in added time to earn the Austrians a deserved draw.
Gareth Bale and Son Heung-min were also on target for a disjointed Tottenham.
"I think it's a question of attitude, which I have experienced before even at Manchester United," said Mourinho.
"I had a similar situation - we lost two matches away in the group phase.
"When we get into the knockouts and you get better opponents and more difficulties, the team faces matches in a different way."
Asked what he had learned, Mourinho said: "Nothing new, really. The fact that the Europa League group phase doesn't motivate some of the players, I knew it."
Spurs were fortunate to head in at half-time level after Bale's penalty cancelled out Peter Michorl's opener in Linz.
Son slid a finish beyond Alexander Schlager to put Spurs in front but three goals in a dramatic final 10 minutes saw both teams take a point.
Johannes Eggestein levelled in the 86th minute and Alli thought he had won it from the spot two minutes later, before Karamoko's 93rd-minute effort.
Spurs lost 1-0 to Royal Antwerp in Belgium in October and beat Ludogorets 3-1 away from home last month.
They are through with a game to spare but will need to beat Antwerp at home next week if they are to progress as group winners.
"Our team at home is a different team," added Mourinho.
"When we go to Antwerp, to Ludogrets, to LASK, the stadium, the weather, the emptiness, the atmosphere - I have a feeling, which is not a feeling, it's experience, that some of the players, they feel that they shouldn't be here.
"But the contradiction on that, is that players like Son and Pierre [Hojbjerg], players starting every match, are the examples of the guys that it doesn't matter where, doesn't matter the competition, they are there. And they are there for the team all the time."
Spurs' fringe players fail to shine
Dele Alli's penalty was one of three goals in the final 10 minutes
With the north London derby against Arsenal on Sunday, Mourinho made eight changes to the side that drew 0-0 at Chelsea, but Alli and Harry Winks were still only on the bench.
Those given their chance did little to impress and a sluggish start on a freezing evening in Linz meant a string of saves from Hart were needed to keep the side sitting second in the Austrian Bundesliga at bay.
LASK's pressure eventually told as the hosts broke following Matt Doherty's slip and Michorl's long-distance effort beat former England number one Hart down to his left.
Tottenham struggled to string a pass together before their first move of note saw Tanguy Ndombele's shot hit Andres Andrade's arm and Bale converted from the spot for his second Spurs goal since returning on loan from Real Madrid - and the 200th of his career overall.
Two of the three players who kept their places from the goalless draw at Stamford Bridge then combined to put Spurs ahead as Ndombele seized on an error in the LASK midfield to slide Son in on goal.
Bale and Son almost combined for a third, only for the Wales forward to place his pass behind the South Korean.
Alli has found himself out of favour under Mourinho this season, only featuring twice in the Premier League with his game time largely restricted to European nights.
The 24-year-old did get his chance with eight minutes remaining and proved he was able to keep his nerve from the spot during the dramatic late goal flurry.
Mourinho said he noticed a "difference in intensity, communication and enthusiasm" in Spurs' warm-up for the match in Austria.
He will expect a hugely improved performance against Arsenal and said afterwards he believes talismanic frontman Harry Kane will be available.
"I could be now doing some bluff or pretend he is in big trouble. He's not in big trouble. He is going to play," said the Portuguese.
-- Courtesy of BBC Sport