The Swans have made everyone sit up and take notice of their passing style and sit 10th with wins over Arsenal, City and draws against us and Chelsea in the bag.
Now they travel to Whiet Hart Lane for a 4pm kick-off on Sunday.
"Brendan has done an amazing job with the way he's got Swansea playing this season," said Harry.
"I just think it's been fantastic that a team can be promoted and play the way they have played, pass the ball as they do and cause problems for everyone they play against.
"United, City, us, Arsenal, Chelsea, they don't care who they play against, they just give them big, big problems.
"They are fearless, take the ball in tight situations and play from the back. You don't see Barcelona lumping the ball forward with two or three minutes to go, they keep passing knowing they will get one more opportunity and Swansea do that.
"I can't speak highly enough of what Brendan has done.
"I think it will be a difficult game for us on Sunday, but it will be a smashing game. I have nothing but respect for them but we have good players, we play, and it should be a great game."