'I played Messi and Ronaldo but this little-known striker made me lie awake at night'
"God, before games against his Atalanta side, I couldn’t sleep at night. His power and physicality made him my nightmare. Then, I was lucky enough to play against so many champions. [Didier] Drogba, Ronaldo, Messi, [Fernando] Torres, and I forget others, but it was too good."