Spain coach Vicente del Bosque has warned Chelsea pair Cesc Fabregas and Diego Costa their places are now in jeopardy.
The Blues duo cried off this week due to injury.
Del Bosque told Onda Cero: "Maybe when Costa and Cesc return, other players will have taken their place.
"That's not a threat: it's a reality. My responsibility has always been to search for normality, the best thing for our football."
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