Proudfoot said give him another three or four years and England could have the next McCaw.
England flanker Tom Curry. Photo / INPHO/Craig Mercer/Photosport
"He's a special, special player," Proudfoot told BBC Sport of Curry.
"His mindset for growth and improvement, his determination, his relentless training regime...how he takes onboard information, asks questions and makes sure that he adds the right thing to his game.
"When you see that in a player you know he will go a long, long way.
"If you look at the way Tom has improved in the last three or four years, if he just continues that growth, I think, in three, four years' time, he could be another McCaw."