Chelsea defender David Luiz insists he wasn't laughing at Rafael after the Manchester United fullback's dismissal last week.

Luiz caused controversy when he was spotted laughing as Rafael was shown a red card for clattering into him.

"I didn't laugh at Rafael getting sent off - I was smiling before the ref showed a card.

"I was laughing at the fans singing about Sideshow Bob.

"People always call me that, so one day I want to meet him!"