Borussia Dortmund's hopes of salvaging European football from their Bundesliga campaign were dealt a serious blow as they suffered a 2-1 loss away at Wolfsburg.
Goals early in each half from Daniel Caligiuri and Naldo proved enough for the home side to triumph at the Volkswagen Arena in a dress rehearsal for the DFB-Pokal final, which now looks Dortmund's best chance of reaching the UEFA Europa League.
However, they were unable to get back on level terms again, and the defeat leaves them three points behind sixth-placed Augsburg in the Bundesliga table with just one round of fixtures to go.
But, while the pre-Christmas Dortmund may have folded after conceding so early, Klopp's in-form side instead responded impressively.
They did not have long to wait to get back on level terms as Kampl burst behind Wolfsburg's back four and beat the onrushing Benaglio to the ball, the goalkeeper's clumsy contact giving referee Marco Fritz little option than to point to the spot.
The score remained 1-1 through to the break, though Aubameyang wasted a glorious chance to double both his and Dortmund's tally, somehow heading Henrikh Mkhitaryan's right-wing cross wide with the goal at his mercy.
It did not take long after the interval for the home team to punish Aubameyang's miss and move in front again.
Naldo got Wolfsburg's second goal, the defender – who also netted in the 2-2 league draw between the sides earlier in the season - turning to fire in a loose ball with his left foot after Dortmund had failed to deal with a corner.
Dortmund host Werder Bremen next week, a game which may prove little more than a warm-up for May 30's Pokal final, where revenge for this defeat will be just one thing on Klopp's mind as he leads Dortmund for the final time.
