Cristiano Ronaldo says a decision by Spain's administrative sports court to uphold his five-game ban for pushing a referee is "incomprehensible".

The court told AFP it had rejected the 32-year-old Real Madrid forward's appeal after he was sent off in the 3-1 win against Barcelona in the Super Cup.

He got a one-match ban for two yellow cards and a further four for pushing the referee after he had been sent off.

"From injustice to injustice, they will never bring me down," he posted.