Dean Mouhtaropoulos/Getty Images
We've seen the familiar 4-2-3-1 formation from Jose Mourinho this pre-season, while the Chelsea boss has also reverted back to his old 4-3-3 from his first spell in charge.
We could be set for something different next season after Mourinho opted for a 3-5-2 against Ferencvaros.
The change came after the break when Chelsea were chasing victory. Mourinho made full use of his unlimited substitutes to pack out midfield and dominate possession.
It worked, too, as the Blues grabbed a late winner through Cesc Fabregas.
Interestingly, after that goal, Mourinho changed the formation again, this time making it a 5-4-1 in order to protect Chelsea's slender lead.
Come the final whistle, the Blues were unrecognisable from the team that had started the game.
Despite all those changes, however, Mourinho got his wish by coming away victorious. Another experiment worked, and next season, we may well see him adopt the new strategy if the situation calls for it.
Garry Hayes is Bleacher Report's lead Chelsea correspondent. Follow him on Twitter @garryhayes