Blues boss Mourinho left attacking trio Oscar, Loic Remy and Radamel Falcao at home for the midweek trip - only informing them of the decision at the last minute.
And The Guardian report concern is growing among the squad of Mourinho's apparent blame game - particularly the decision to ostracise captain John Terry and hand the armband to Branislav Ivanovic.
REUTERS
John Terry was an unused substitute during Chelsea's defeat at Porto
Mourinho raised eyebrows by not picking a striker on the bench in Portugal, opting to bring on summer signing Kenedy when chasing the game in the second half.
The former Real Madrid coach has been publicly critical of his players this term and again hit out at his defence after losing 2-1 to Porto.
"For us, it's a ridiculous mistake," said Mourinho.
Eden Hazard and Nemanja Matic were dropped from the side that drew 2-2 with Newcastle on Saturday, although both came off the bench against Porto.
But the decision to keep Terry out of the team is said to have surprised senior players.
Chelsea fans made their feelings clear, chanting "We want our captain back" as the 34-year-old warmed down at the Estadio do Dragao.
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