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It's been speculated that Jose Mourinho didn't have a clear picture in his mind about what his best lineup was.
Of course, the names of Petr Cech, John Terry and Eden Hazard appear regularly enough amongst his team sheets to know they are going to feature. But as a contrast to his 2004-05 title winning side, rotation has become a key policy under Mourinho during his second stint as manager.
Whether he is unsure about some players, taking Juan Mata as a clear example, is unknown. Oscar featured prominently in the early parts of the season, but was replaced by Andre Schurrle for the 3-2 defeat against Stoke.
The Brazilian was left out again in the match against Crystal Palace, and while it's surely nothing personal, Mata's resurgence in the first-team is something to note.
Willian has also been impressive in his appearances in a Chelsea shirt, and was unfortunate to see his wonderful effort hit the post, before Torres tapped it in.
The defensive pairing of David Luiz and John Terry appears to be reminiscent of the same partnership he had with Ricardo Carvalho, and while it may take time to solidify under Mourinho, they work better together than with Gary Cahill.
Rotate by all means to maintain freshness, but the key to winning in the Premier League is consistency, and the 50-year-old coach needs to keep faith in his first-choice team if he is to achieve that.