Dennis Diekmeier (born 20 October 1989) is a German professional football manager and former player who currently works as an assistant coach for 3.

His form there led him to being named to one of the best full-backs in the league, after which he joined Hamburger SV in July 2010, where he enjoyed a successful eight-year spell.

Diekmeier was born in Thedinghausen, Lower Saxony, and grew up in Achim, where he attended school alongside fellow future Werder Bremen player Felix Wiedwald.

[5] Eight rounds into the competition, Diekmeier was the only Nürnberg player who had played eight full games, alongside goalkeeper Raphael Schäfer.

In the final training session before the ninth match-round, however, he suffered a severe allergic reaction and was treated after an emergency helicopter flew in.

[8] During the winter break, VfL Wolfsburg offered an estimated € 4 million for Diekmeier, which eventually did not amount to a transfer.

[9] Instead, Diekmeier ended up signing with Hamburger SV in July 2010, whose home games he had attended as a child and whom he had supported since childhood.

Prior to the 2019–20 season, Diekmeier signed a contract extension keeping him in Sandhausen until 2022,[17] and was also appointed vice-captain by head coach Uwe Koschinat.

On 26 May 2020, Diekmeier finally scored his first ever professional goal at the age of 30 in Sandhausen's 1–0 away win over SV Wehen Wiesbaden,[19] a feat which the club celebrated by offering free printing of his name and number on their replica kits.

[20] This goal proved momentous in marking the first of four consecutive victories for Sandhausen towards the end of the 2019–20 season, the points from which they secured to stay in the 2.