Atletico Madrid striker Adrian Correa admits he has mixed emotions over the signing of Diego Costa.

The Chelsea striker is undergoing an Atletico medical today after a fee rising to £67m was agreed with Chelsea for his transfer.

Costa could arrive to take Correa's place in Atletico coach Diego Simeone's plans and the Argentine knows he faces a fresh battle for minutes.

"I still want to improve a lot, his arrival will be important for us," said Correa.

"But it will clearly change something in our attack."