The French keeper believes Spurs are not yet at an elite level.
Despite being brilliant domestically this term, Mauricio Pochettino's side were brought back to earth with a thud on Thursday night after losing 3-0 at Borussia Dortmund in a first-leg last-16 Europa League encounter.
The result has certainly opened Lloris's eyes to the quality of other European sides - even in the continent's secondary competition - and the French goalkeeper warns that a potential Champions League campaign next term could be an even bigger shock to the system.
“After a game like that you feel very far from the top teams in Europe,” he told the Evening Standard. “You can feel regret because it’s the kind of game you want to play and you must be ready to compete. At this level, against a team like that, we need more''.
Even though Tottenham have not officially booked their place in Europe's elite competition next term, they look odds-on to qualify via a top 4 Premier League finish.
Tottenham sit second in the Premier League table, five points behind Leicester City - but six clear of West Ham United in fifth.
Tottenham travel to bottom-of-the-table Aston Villa on Sunday.