Oscar and Diego Costa had a fight during their training in the field

Diego Costa and Oscar had to be cooled down by some of their Chelsea team-mates after a flare-up during Thursday’s training session at Cobham. Costa had gone in hard on Oscar with a tackle and the midfielder responded with an extremely heavy one of his own that caused the pair to square up. The session was highly charged, as the squad prepared for Sunday’s FA Cup third round tie at home to Scunthorpe United and, briefly, it looked as though Costa and Oscar were ready to trade punches. But the swift intervention of team-mates who were close to the flashpoint stopped things from escalating. Guus Hiddink, the interim manager, was laid- back about the incident, having seen this kind of thing many times over his long career and it was laughed off afterwards, with both of the Brazil-born players making their peace.