article_snippet: Costa put Koeman's side in the lead, however his effort was cancelled out when the Saints were awarded a first-half penalty which Tadic converted.
article_snippet: Costa came close to grabbing Cuadrado second goal of the match.
article_snippet: Costa's goal came after an intricate move which led to Ivanovic crossing into the box.
article_snippet: Costa came into today's game level with Manchester City's Sergio Aguero as the joint highest goalscorer with 17 goals.
article_snippet: Ivanovic crosses the ball into the penalty box from the right and Costa has the easy task of nodding into the net.
article_snippet: Costa has had a remarkable first season in England - with the former Atletico Madrid man scoring 17 league goals.
highlights_snippet: Diego Costa scored his 18th Premier League goal of the season .
  