Portugal boss Fernando Santos has dismissed Guy Roux's suggestion that Renato Sanches is five or six years older than he claims.

Former Auxerre boss Roux had told Romanian broadcaster Dolce Sport that he believed new Bayern Munich midfielder Sanches, 18, had misrepresented his age.

"Yes, he says he is 18 years old but he must look at his past," he said. "His date of birth was declared a few years later. The date is not true. I believe he is 23 or 24 years old -- but he is a very good player."

The issue is reported to have arisen as a result of Sanches' parents separating and only registering the birth several years later.

Speaking at a news conference ahead of Portugal's Euro 2016 semifinal with Wales, Santos dismissed the questions over Sanches, who made his Benfica B debut in October 2014.