Much has been debated about the concussion substitute rules in cricket over the last 12 hours, thanks to the fourth T20I between India and England that was played in Pune. Indias 15-run win recovering from 12-3 has been overshadowed by the match referees decision to allow Harshit Rana as concussion substitute for Shivam Dube. Dube who scored a brilliant half-century with the bat was hit on the helmet in the final over of the innings. He experienced a delayed concussion and did not take the fi