Munich - In December 2007, at just 15 years of age, became the youngest ever player to grace the hallowed turf in Greece's top flight. Just five years later, the towering centre-back is already a household name both in his home country as well in the Bundesliga.

Following a 2-0 victory over Greuther Fürth at the weekend, Schalke's - and Papadopoulos' attention in particular - turns to the UEFA Champions League group stage, where the 20-year-old defender will go up against former employers Olympiacos on Tuesday (kick-off 20:45 CEST).

bundesliga.com spoke to the 15-time Greek international about facing his old club and what he hopes to achieve with FC Schalke 04, having recently signed a contract extension until 2016.

bundesliga.com: Mr. Papadopoulos, you're getting ready to face your former club and many of your former colleagues. How special will Tuesday's encounter be for you?

Kyriakos Papadopoulos: Obviously this is a game unlike any other. I have a lot of friends in the Olympiacos team and it's where I began my professional career. I owe the club a lot. Once the first whistle goes though, it never matters to me who's on the opposite side of the pitch. At that point the only thing that matters is being successful with Schalke 04.

bundesliga.com: How can your experience from the time you spent at Olympiacos help Huub Stevens?

Papadopoulous: I'm sure that our coaching staff will be able to help prepare us for the match. My job is simply to help the team on the pitch. That's what I'm fully focused on.

bundesliga.com: You know what the atmosphere is like at the Karaiskas Stadium: the Olympiacos fans are very hot-blooded. What do you and your colleagues have to do to prepare for that?

Papadopoulos: The Olympiacos fans are very impulsive and support their team with everything they've got. However, considering that we play in front of twice the amount of supporters every second week in the VELTINS-Arena and our fans create just as much atmosphere, I don't see it being a problem.

bundesliga.com: Olympiacos are the most successful club in Greek football history. Would you say that Olympiacos are to Greece what FC Bayern are to Germany?

Papadopoulos: Olympiacos are an absolutely exceptional team in Greece. They've been Greek champions on 39 different occasions - I think that speaks for itself.

bundesliga.com: What kind of match are you anticipating from a tactical standpoint?

Papadopoulos: It's the first group match and both teams will definitely want to get off to a good start in the Champions League. My task is to make sure that we keep our shape at the back, whilst giving away as little as possible. But maybe I'll have a chance to grab a goal at the other end. That would be the icing on the cake (laughs).

bundesliga.com: You twice won the Greek Super League with Olympiacos and you just extended your contract with Schalke 04 until 2016. What do you think your chances are of celebrating a title success with the Royal Blues in that time?

Papadopoulos: Of course I dream of someday winning the Bundesliga title with Schalke. I believe that we have a very young team with a lot of potential and can continue to develop further. At the moment it's important that we focus on the present and on our current short-term aims, but if we can push forward in a consistent manner, then we can maybe achieve that success before 2016.