Chelsea face competition for Porto striker Radamel Falcao.
The Colombia ace is a top target for new Chelsea boss Andre Villas-Boas, with negotiations expected to intensify after the Copa America.
However, Atletico Madrid are also interested in Falcao and are in contact with Porto about a price for the forward.
Atletico want Falcao as a replacement for the want-away Sergio Aguero, who ironically is a target for Chelsea.
Should Chelsea miss out on El Kun, they're unlikely to allow Atletico a free run at Falcao, who has expressed an ambition to play in England if he must leave Porto this summer.
