Diego Costa sparks more training ground drama after trapping Chelsea team-mate in a boxDIEGO COSTA returned to his pesky ways at Chelsea training today. By Michael Potts 18:47, Thu, Feb 23, 2017 | UPDATED: 19:20, Thu, Feb 23, 2017 Link copied Bookmark GETTYChelsea training Diego CostaDiego Costa created more drama during Chelsea training today after a bizarre incident involving a key teammate and a cardboard box.Cameras were there to capture the entire incident as Costa, helped by Marcos Alonso and Nemanja Matic, caused another stir.CLICK THROUGH THE GALLERY TO REVEAL THE INCIDENT AT CHELSEA'S TRAINING GROUND EARLIER TODAY.Costa laughs off suggestion of joining Arsenal Related articles Man United star fires warning to Chelsea: How we can still top the tab Chelsea make Frank Lampard announcement: Fans will love this Chelsea line-up predicted: Conte forced to make two key changes? SUBSCRIBE Invalid emailWe use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy Premier League Diego Costa Chelsea FC