ESPN Journalist: Diego Costa’s Chelsea future is up in the air after a row between him and José Mourinho broke out in the dressing room following Chelsea’s shock 1-0 loss to Southampton at Wembley. Costa, who leads the Premier League’s goal scoring tally with 24 goals in 32 appearances, came on as a halftime substitute to win the game, or so Mourinho hoped. Instead, Costa was penalised and booked for diving in the penalty area not once, but twice. It is not clear whether the volatile striker wants to stay at the club, or if Mourinho wants to keep his leading man, but what is certain is that the list of potential suitors interested in the availability of the player would be a long one.