By ESPNSTAR.com staff
Sahin, who began his career at BVB, left the club in the summer of 2011 to join Real Madrid but injuries restricted him to just ten appearances for the La Liga giants.
Desperate to regain the form that saw him stake his claim to being one of Europe's brightest midfield prospects, the 24-year-old decided to join Liverpool on loan at the start of the season but also failed to establish himself at Anfield.
Now back on loan at the Signal Iduna Park after the Reds agreed to terminate their deal with Real, Sahin admitted he was nervous ahead of pulling on the Dortmund jersey once again at the weekend.
"I was really nervous ahead of the match against Mainz," he told Bild. "That's pretty unusual for me to be honest.
"It reminded me a bit of my official debut for Dortmund at the age of 16.
"All the nerves were gone after five minutes or so, though."
Before moving to Spain, Sahin spent five full seasons with BVB and made over 150 appearances for them.