Ahead of the visit of Swansea City on Saturday, the players were in good mood as they trained on Thursday.

Diego Costa was in the mood to be mischievous during training on Saturday as he enlisted the help of defender Marcos Alonso to trap Eden Hazard inside a cardboard box.

Hazard was completely unaware as Alonso and Costa crept up on him as they walked out for training and trapped him in a cardboard container.

Unsuspecting Eden Hazard walks out for training as Diego Costa and Marcos Alonso trail him with a cardboard box

Costa and Alonso pounce on the unsuspecting Hazard as they move the box over his head

Alonso and Costa try to encase Hazard in the box

Nemanja Matic can’t stop laughing as he joins Alonso and Costa to get Hazard under wraps.

Chelsea boss Antonio Conte laughs as Costa looks for his next victim

Victor Moses watches his back as Costa finds next victim

After Costa’s mischief, the players got serious for training.