Chelsea could beat Real Madrid to one player’s signature this summer. The transfer window is not officially open yet, but Chelsea have already got down to work. The Blues recently confirmed the signing of Tosin Adarabioyo from Fulham on a free transfer. He will not be able to link-up with the Chelsea first team until he turns 18, but the club also look set to sign Palmeiras youngster Estevao Willian. BBC Sport reported last month that Chelsea had agreed an initial £29m fee with Palmeiras for Estevao. However, the winger may not be the only Brazilian teenager who joins the Blues this summer. Ch…