European champions Chelsea  and English champions Manchester City  are both tracking Benfica striker Nelson Oliveira , and can try to bring him in the Premier League after the end of the season.
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.
According to the Daily Mail, 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..
Oliveira is currently on a season-long loan to Spanish side Deportivo La Coruna. His
Benfica deal runs until 2017 and contains a 24 million pound buy-out clause. (ANI )