The Reds' defensive deficiencies were laid bare at Wembley in October last season, with a Harry Kane-led Tottenham running riot in a 4-1 victory. Liverpool centre back Lovren took the brunt of the blame, as he was substituted after just 31 minutes.
Klopp, speaking to reporters (as quoted by football.london), ahead of Liverpool's return to Wembley almost a year on, has emphasised that he never lost confidence in Lovren's ability, despite hooking him off after just half an hour.
He said: "It was a very difficult game for us because we made big mistakes around their goals. It was after we won 7-0 v Maribor. It was kind of a wake-up call for the players.
"I’m 100% sure - I was never in doubt about Dejan.
The German also added that although Lovren wasn't happy to be subbed, the pair never spoke of it after the game.
He continued: "I could have changed five or six players but I did that and he wasn’t happy about it. But we all have our 20 minutes.