Downing warned that the Reds will have to be wary of the 35-year-old.
He told liverpoolfc.com: "He's an important player for them. You can see with his finish for the goal - his quality. We were warned about him before the game. In the first half we nullified him, we had plenty of the ball.
"But top players only need a second or a chance and they can sniff it out, and he did. He'll be a big player for them, but we should concentrate on what we should do to their team and how we can hurt them."