What is a Grade 4 hamstring tear, the injury that has sidelined Ayush Mhatre?

What is a Grade 4 hamstring tear, the injury that has sidelined Ayush Mhatre? left File picture: Ayush Mhatre is likely to be out of action for a long time. Emmanual Yogini https://ss-i.thgim.com/public/cricket/t5yfm5/article71582806.ece/alternates/FREE_1200/ayush%20mhatre.jpg.jpeg Ayush Mhatre is set to miss another month after suffering a Grade 4 right hamstring tear in the Ranji Trophy. Ramji Srinivasan explains the injury. Mumbai batter Ayush Mhatre’s return to action from a hamstring injury lasted only one innings as he suffered a Grade 4 right hamstring tear in the opening round of the Ranji Trophy, ruling him out for another month.