Jürgen Norbert 'Kloppo' Klopp (born 16 June 1967) is a German former footballer and the current manager of Borussia Dortmund in the Bundesliga.

Klopp played his entire senior career for 1. FSV Mainz 05 from 1990 to 2001. He originally played as a striker, before switching to play as a defender in 1995.

Upon his retirement from playing for Mainz 05, Klopp was appointed as the club's manager. He remained as manager for seven years, during which time he led the team to its first appearance in the Bundesliga, and qualification for the 2005–06 UEFA Cup. At the end of the 2006–07 season, Mainz 05 were relegated, but Klopp chose to remain with the club. However, due to the fact that they were not able to achieve promotion, he resigned at the end of the 2007–08 season.

In May 2008, Klopp was approached to become the new manager of Borussia Dortmund, eventually signing a two-year contract at the club, which had finished in a disappointing 13th place under previous manager Thomas Doll. In his first season in charge, Klopp guided Borussia Dortmund to win the DFB-Supercup, defeating German champions Bayern Munich. Klopp took the club to a sixth place finish in his first season in charge, and a fifth place finish in the season after that, before leading the club to successive Bundesliga titles in the 2010–11 and 2011–12 seasons. During the 2011-2012 season, the 81 points accrued by Borussia Dortmund was the greatest points tally ever amassed in Bundesliga history and the 47 points earned in the second half of the season also set a new record. Borussia Dortmund's 25 league wins equalled Bayern Munich's 1972/73 milestone while their 28-league match unbeaten sequence was the best ever recorded in a single German top-flight season. On 12 May 2012, Klopp made Borussia Dortmund history by sealing the club's first ever domestic double, by defeating Bayern Munich 5–2 to win the DFB-Pokal. Klopp described the double as being "better than (he) could have imagined".