There is no guarantee considering there are many factors to consider. Benjamin Mendy became literally half the player he was after his initial ACL tear and suffered multiple injuries before his second knee injury.
The main issue is that the surgery itself changes the overall mechanics of your body, which can attribute to other muscular injuries moving forward. It is all dependent on how the body reacts to the change. If it is a patellar graft, Chilwell has a risk of suffering more knee injuries in the future. If it is a hamstring graft, Chilwell has a risk of losing his pace and will have loads of macular imbalances in his thigh in the long run.