Gyokeres and Dowman struck in the final minutes for the 2-0 win on Saturday.
The Swede said afterwards: “When you see him play, you don't think that he's 16.
"You don't think about it when he has the ball with the composure and the confidence he plays with. It's incredible - to see him score that goal was amazing.
“He's been developing. He got an injury and was out for a while so I didn't see him for a few months, but now he's back and he's playing still with the confidence that he did before. He makes a lot of right decisions when he comes on the pitch. He's an incredible and very good player.”
Gyokeres added, “It's a very important win for us at this stage of the season. We haven't got a game in the Premier League for a few weeks now, so of course it was nice to get the win with that in mind as well."