By FOX Sports staff
Four games into the new Bundesliga season, Dortmund currently find themselves top of the table after picking up a maximum 12 points and are preparing for the group stage of the UEFA Champions League, where they will be looking to emluate last season's magical run to the final.
Despite the summer departure of star attacker Mario Gotze, BVB had reinforced well during the transfer window and possess a formidable side now with new faces Henrikh Mkhitaryan, Pierre-Emerick Aubameyang and Sokratis Papastathopoulos joining the likes of Robert Lewandowski, Marco Reus and Mats Hummels at the Signal Iduna Park.
But in what must be a frightful prospect for their upcoming opponents, Klopp believes there is still more improvement to come from his charges.
"We haven't reached our peak in terms of performance yet," he said on UEFA's official website. "But if we look at our results last season, then we [have] almost achieved it.
"We still don't have a clue how well the team can play, we still have to show that."
Since taking over at the helm of Dortmund in 2008, Klopp has revived the club's fortunes and led them to successive league titles from 2010 to 2012, before they lost out to Bayern Munich last term.
However, he insists there is no magical formula between the drastic improvement.
"We cannot make good players out of bad players," Klopp explained.
"We need to recognise the potential in the right players, try to develop it to turn it into skills with the help of everyone involved. That's how you can find success.
"Generally, I think we can make a team better with the way we work, with the way we train."
Klopp also admitted Dortmund would need a bit of luck if they were to emluate last season's run in Europe, after being drawn alongside Arsenal, Napoli and Marseille in Group F.
"You can only reach the final by also being lucky in some situations," he added. "No team makes it to the final just because they're the best and strongest team.
"We were certainly not the best team and therefore we needed a bit more luck. You also need a big heart, great desire and then we can make it a long way but we might also be knocked out in the group stage."