Lamela has caught the eye on Roma's preseason tour of the US.
"We work really hard with Zeman. I'd never experienced anything like it before, but I am sure it will pay off. Roma will improve on last year's results," he told the Corriere dello Sport.
"The tactics represent a completely new way of staying on the field for me. At River Plate I was accustomed to waiting for the ball in every move, so it all went through my feet. At Roma it is very different."