Ahead of tonight's Carabao Cup third round tie against Doncaster Rovers, Frank discussed the young attacking pair.
"Both of them are exciting and good players. Let’s start with Wilson. I think his game against Brighton was promising," he said. "I liked the variation in his game so he could go on the outside and produce a cross with his left foot. He could go inside and cut across. He combined nicely.
"Good link-up play as well, good understanding of his team-mates, worked hard. Probably a little bit of… I hate to say end product, I don’t want to say that so I’ll say arriving in the box. That’s where he’ll score most of the goals. I think he’s in a good place."
He added: "Mathys, the same. I like what I’ve seen so much in training. I think he played a decent game against West Ham as a striker. Maybe both of them are best to the left so that gives me a nice challenge in terms of that.
"What I’m convinced about is that Tottenham have two very good players that I am very convinced will be very good for us over the next years."