LONDON -- Enzo Maresca has rejected any suggestion Chelsea have a discipline problem despite picking up their third red card in four matches during Tuesday's 1-0 win over Benfica .

The Blues marked their first Champions League home game with an important win as Richard Ríos' 18th-minute own goal was enough to condemn former Chelsea boss Jose Mourinho to defeat on his return to Stamford Bridge.

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João Pedro was introduced in the 61st-minute but was sent off deep into stoppage time after picking up a second yellow card for dangerous play after lifting a high boot in the direction of Benfica's Leandro Barreiro .

It follows dismissals for Robert Sánchez at Manchester United and Trevoh Chalobah against Brigh

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