Universidad Catolica have confirmed interest from Manchester United for young striker Nicolas Castillo.

However, Catolica's sporting director Jose María Buljubasich says no offer has yet arrived for the 20 year-old.

"We can't deny that Nicolas wants to be sold, as any talented young player would," Buljubasich told Bio Bio. "However, there is no formal offer yet.

"There is interest, but I reaffirm that there is nothing concrete. We understand what he needs, but there is a structure at the club."