El Ahmadi saw De Jong's development first hand in Holland, where he cracked an impressive 39 goals in 65 league games with his first club FC Twente.
"He's a quality player and he's a goalscorer. We'll have to take a good look at him up there on Sunday as he's going to be very dangerous.
"He has everything - good technique, good touch, makes excellent runs into space and knows where to stand in the box. And he scores with both feet and head.
"Watching him in Holland I always thought he would make a good player in the Premier League because he has everything needed for this level.
"Coming to England was a good choice for him - and he'll show that to Newcastle and the rest of the Premier League."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball