The Irish star showed some sublime touches and had a hand in two goals in a debut described as 'magnificent' by boss Glenn Hoddle in the last-gasp win against West Ham on Sunday.
A bundle of energy throughout, always demanding the ball, always probing, his flash of brilliance to win a penalty when he controlled and flicked the ball over Ian Pearce's head underlined Teddy's point.
The skipper, who buried that penalty, said: "He's just got that something different, something we haven't got between the rest of the strikers.
"It was a funny game for him to get involved in but he showed glimpses of excellence, especially to get the penalty for us.
"If the ball had come to me there is no way we'd have got a penalty out of that, the way he sucked the fella in and flicked over his head in one movement.
"I thought he had a very good debut. It's early days but I'll be doing my upmost to help him settle in and watching him closely to see what I can and can't do alongside him, if I'm playing. We've five strikers who can do a great job for the club now."
Teddy Sheringham says his new strike partner Robbie Keane gives the side 'something different'.