Welbeck revealed he studied the game closely from the bench before entering the fray in the second-half.
"I was observing the game closely from the bench and I wanted to make an impact. But I wouldn't have made a difference if the other players hadn't worked hard before I came on," a modest Welbeck told BBC Radio.
"I know I'm up against some great competition, Roy Hodgson has a wide variety of strikers to choose from. Jermain Defoe was selected ahead of me tonight and he's a sharp shooter. I'm just biding my time and looking to make an impact when I do get on the pitch."