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

Team India physio Nitin Patel came out to help Nayeem Hasan after the Bangladesh batsman was hit by a brutal Mohammed Shami bouncer on Day 1 of the Day-Night Test at Kolkata

Indian pace battery ran through the fragile Bangladesh batting, before Cheteshwar Pujara and Virat Kohli eased to half centuries as India reached 174/3 at stumps on Day 1 of Day-Night Test at Kolkata

During Day 1's play of India's first-ever Day-Night Test at Eden Gardens, rivals Bangladesh became the first team to use two concussion substitutes after Liton Das and Nayeem Hasan were replaced after being hit by Mohammed Shami bouncers

Mehidy Hasan replaced Liton Das as a concussion substitute as Bangladesh were bowled out for just 106 inside three hours in the Day-Night Test at Kolkata

Minutes before the tea break on the third day of the third and final Test, South Africa batsman Dean Elgar tried to duck a short delivery from Indian fast bowler Umesh Yadav, who was in the middle of a hostile spell of short-pitched bowling

Michel D'Hooghe – the chairman of FIFA's medical committee – spoke to Omnisport about the proposed introduction of a concussion substitute

Darren Bravo, who was hit by a Jasprit Bumrah bouncer during third day's play of the West Indies vs India second Test, became the second concussion substitute in men's Test cricket, after Australia's Marnus Labuschagne, who came in for Steven Smith in the Lord's Ashes Test last month