Thomas Tuchel’s half-time change against Barnsley could provide a clue as to how Chelsea will operate in the future.The Blues made it through to the FA Cup quarter-final with Tammy Abraham’s goal proving enough to knockout Championship outfit Barnsley.Chelsea struggled in the first-half at Oakwell with Tuchel having made ten changes from the weekend win over Sheffield United.Tuchel had picked Andreas Christensen, Kurt Zouma and Emerson as his defence with Marcos Alonso and Callum Hudson-Odoi as wing-backs.Though it changed to a back four at the break with Antonio Rudiger replacing Christensen and Reece James coming on in place of Alonso.It saw Emerson shift to left back with James slotting in on the right side of defence and Chelsea looked.
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