Yu has been prevented by Benfica on previous occasions to join Ratomir Dujkovic's squad and the youngster said: "Benfica haven't allowed me in other times, but now they've given me a chance and allowed me to come, even though these games (against USA) are not included in the official football calendar.

"I know that I will not have much time to train and play with my buddies, so I'll grab every minute to show my game."

Also in Dujkovic's squad are Vitesse Arnhem prospect Yu Hai and Manchester United striker Dong Fangzhuo.