Manchester United boss Sir Alex Ferguson is keeping tabs on Atletico Bilbao 19-year-olds Javi Martinez and Markel Susaeta.
Both are Spanish Under-21 midfielders and Martinez is valued at £15m by Bilbao, who have him tied up until 2012.
Martinez said: "I have been surprised to hear about United, but it is a compliment to me and praise for my work."