Two of European football's biggest clubs are keeping a close eye on Cavan Sullivan, the teenage United States international who is set to join Manchester City. According to Transfer Talk, both Real Madrid and Barcelona have registered an interest in the youngster and could pursue him in the future.

Sullivan has emerged as one of the most exciting young talents in American football, attracting attention from clubs at the very top of the European game. His imminent move to Manchester City has done little to deter the Spanish giants, who appear willing to monitor his development before making a potential approach.

The teenager represents the next generation of United States talent, and his trajectory has clearly caught the eye of decision-makers at both the Santiago Bernabéu and the Camp Nou. While any move involving Real Madrid or Barcelona remains speculative at this stage, the interest underlines just how highly Sullivan is regarded across European football.