A Bola says the 18 year-old midfielder, who is tied to Estoril, is training with Roma with the view to earning a contract for next season.
Vaz has an Italian mother and arrived in Rome on Monday.
Tribal Football Staff are dedicated to the football tribes from all over the world. Our team is passionate about delivering football news to our hundreds of thousands of followers in all the corners of the globe. Football is life, It never stops, Neither do we.