The run-up to the Test series between India and Australia was marked by a series of blows to the head and concussion-related substitutes, reviving the debate around the use of bouncers by fast bowlers
India's move to use concussion substitution raised eyebrows with many, including in the Aussie camp, questioning the intention and also the qualification for "like for like" criteria
India all-rounder Ravindra Jadeja was replaced by spinner Yuzvendra Chahal as a "concussion substitute" during their first T20I against Australia at Manuka Oval, Canberra on Friday
Steve Smith was hit on the head during a net session before first England vs Australia ODI. He was also infamously felled by a Jofra Archer bouncer at Lord's during last year's Ashes