Blues manager Steve Bruce has been keen to add to his back four since the departure of the experienced Bruno N´Gotty to Leicester at the end of the last campaign, and the Brazilian is to undergo a two-part medical after agreeing to make the temporary switch from France to St Andrews.
Bruce said: "We saw Lille play in the league against Paris St Germain and Auxerre and Rafael impressed both times - and in the Champions League as well."
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