The versatile defender arrived in Westphalia this summer after spending two seasons at Werder Bremen and slotted in seamlessly alongside Mats Hummels in central defence, showing the aerial ability and ruthless tackling which have earned him his hard-man reputation.
"Ready to give my all"
Watching last week's thrashing of FC Augsburg from the sidelines whet the 25-year-old's appetite for a taste of the action, with his post-match comments on Sunday leaving little doubt about how much he had longed for an appearance under the eyes of almost 80,000 Yellow-Black faithful.
"I spoke to the coach two days before the game and he told me I'd be playing," he explained. "As soon as I knew I that, I made sure I well prepared and was ready to give my all."
Battle for places
The hosts found Braunschweig rather more dificult to breakdown than Augsburg and failed to find the net until 15 minutes from time. "The game was difficult initially because now teams know how good Dortmund are," Sokratis said. "They play very deep and make it tough if you don't score early."
Yet despite his own convincing display, winning a regular place in the heart of Dortmund's defence will be tricky, with Hummels and Neven Subotic the established pairing. However, Sokratis' ability to play at right-back means he should earn plenty of playing time, especially with Lukasz Piszczek currently out injured.
Clash with the friends
Sokratis' next chance to shine arrives on Friday evening, when former club Bremen come to town. "It'll be quite special," he said. "I spent two fantastic years there, but now I'm a Dortmund player".
While looking forward to renewing old acquaintances, the amicable defender insists he won't be going easy come kick off. "There's no friendship on Friday - we want to keep the points in Dortmund."