Ricardo Carvalho has clashed with his Chelsea manager Luiz Felipe Scolari, it has been revealed.

The Sun says Carvalho disagreed with the decision to switch to zonal marking at set-pieces.

Boss Scolari then dropped the defender for Wednesday's FA Cup win at Southend.

The row follows incidents with Nicolas Anelka and Didier Drogba in the last two weeks.

Carvalho is believed to have spoken to Scolari in the days before the tie and said he thought a change to a zonal system was wrong.

But Scolari insisted on the switch after seeing his side concede too many goals at set-pieces.