On international duty with Spain, Costa was grappling with rumoured Chelsea target Leonardo Bonucci and things suddenly turned nasty.
Costa was lurking behind the Juventus defender before giving the Italian an almighty slap on the face.
Bonucci did his best to get Costa sent off as he immediately threw himself to the floor in ‘agony’.
Costa gave Bonucci a consoling pat on the shoulder but he probably wasn’t best pleased with his potentially future teammate.
Check out the clash above.
source:talksport.com
watch video here