Barcelona, Real Madrid, Chelsea & Manchester City eyes Benfica prospect Nelson Oliveira

Chelsea and Manchester City are leading the chase for one of Europe's top prospects after making repeated checks on Benfica striker Nelson Oliveira.

The 20-year-old has been on Chelsea's radar since impressing as a substitute for Oscar Cardozo at Stamford Bridge in the Champions' League last April, while City have begun monitoring his form after a clear signal Benfica may have to cash in on him at the end of the season.

Barcelona are also keen admirers, while Real Madrid are aware of a likely scramble to sign him next summer, with Jose Mourinho's agent Jorge Mendes representing him.

At 6ft 1in, Oliveira has been likened in Portugal to a taller version of City striker Sergio Aguero, for his mobility and link-up play as well as clinical finishing.

A surprise selection for this summer’s European Championships, after being voted second-best player at the under-20 World Cup 12 months earlier, he made four substitute appearances and followed up with his first senior international goal, in a 2-0 win over Panama.

Oliveira is currently on a season-long loan at Spanish side Deportivo La Coruna. His Benfica deal runs until 2017 and contains a £24million buy-out clause.