article_snippet: Diego Costa may be Chelsea's star striker but David Luiz has well and truly misfired in Champions LeagueChampions League.
article_snippet: Diego Costa shows David Luiz frustrations during Chelsea's Champions League exit on Wednesday night .
article_snippet: PSG defender David Luiz gestures towards Diego Costa during the 2-2 Champions League draw at Stamford Bridge .
article_snippet: Diego Costa argues with PSG defender Thiago Silva on a frustrating night for Blues fans .
highlights_snippet: READ: Diego Costa and Eden Hazard battle in vein as David Luiz inspires PSG .
  