Sunderland can reach Brobbey from Xhaka's first pass or a wide second ball. Chelsea can pressure that outlet and move the recovered ball into their creators between the lines. The first defensive connection and the next box contact after a reply are the key phases.
Chelsea's Lavia and possible Caicedo recovery can feed Palmer, Rogers and Estevão against Sunderland's re-forming back line. Sunderland's recent chase created shots after early concessions without producing the goal that changed the result. Chelsea's João Pedro is ruled out, while Caicedo requires a final check after playing against United; Palmer, Rogers and Estevão played that match. Sunderland's Alderete is suspended after his league dismissal, and Mukiele's return is uncertain after missing the recent games.
Chelsea's current creators have a route to score first and to supply another box chance after Sunderland answer. That's why I'm siding with Chelsea to win.