At Milan when I was younger, I worked a lot on the leg press because I'd lost a bit of my natural speed as my body was changing. I was growing too fast for the rest of my body to cope and I had some knee problems. I worked really hard in the gym to regain these fast sprints.

I always set myself new goals. I always want to do better than I did in the past. I always want to achieve things I never achieved before.

I want to score goals in every match, as many as possible.

In football you never know, but generally speaking, I feel more than comfortable here [in Borussia Dortmund]. There' s no place on earth I'd rather be.

Didier Drogba and Samuel Eto'o, two fantastic African footballers. So successful. And very nice characters as well. I got the luck to know them personally. They helped me a lot.

Every goal is hard work, especially in such an excellent league as the Bundesliga; or even take the Champions League.

The moment my name was called [Africa's Footballer of the Year] was truly overwhelming and I was about to scream with joy.