Conte unclear about Diego Costa's Chelsea future

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New Chelsea boss Antonio Conte hinted that star striker Diego Costa's future at Stamford Bridge isn't guaranteed, neither confirming nor denying the prospect that the Brazilian-born Spain international could depart the club this summer.

Costa has been linked with a return to Atletico Madrid, but the club added Kevin Gameiro out of Sevilla on Saturday, casting doubts on further reinforcements to Diego Simeone's offensive ranks.

Conte refused to give a clear-cut answer, regardless.

"I speak for today and today Costa is Chelsea's player," Conte said, according to ESPN FC. "Tomorrow if you ask me if Costa will remain with us, I don't know.

"I can say that today Costa is a Chelsea player. He didn't play in these games because of injury and if he solves the injury and I see in training he's in good shape it can be possible to see him in the next game against AC Milan. But I can tell you only this."