article_snippet: former team-mate Diego Costa former team-mate Diego Costa came to England with a reputation as a bullish centre forward and, as plenty of Premier League defenders will attest to, Chelsea has more than lived up to the billing.
article_snippet: former team-mate Diego Costa has been involved in numerous scuffles with defenders during last season, including a running battle with PSG defender David Luiz in Wednesday's Champions League clash .
article_snippet: former team-mate Diego Costa former team-mate Diego Costa argues with PSG midfielder Thiago Motta as Thiago Silva pushes his away .
highlights_snippet: Chelsea welcome Southampton to Stamford Bridge on Sunday .
  