After weeks of fine-tuning systems, the new Premier League season has kicked off.
It's been a productive summer for the Blues. New signings were secured early, and since the World Cup, Mourinho has used pre-season effectively, integrating Cesc Fabregas, Diego Costa and Filipe Luis.
Costa is a certainty to start against the Clarets, but there are still questions surrounding the rest of Mourinho's selections.
Ahead the Turf Moor clash, Bleacher Report takes a closer look at the decisions Mourinho needs to make.