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Anterior cruciate ligament (ACL) rupture is a common athletic injury in adolescents which typically requires surgery to repair the injured ACL. Despite considerable efforts to improve outcomes, secondary ACL injury is common in athletes who return to sport. One of the main risk factors for secondary ACL injury is asymmetry in landing mechanics. The aim of this systematic review was to identify the common biomechanical asymmetries after ACL reconstruction in adolescents during landing. Sources were identified through searching databases using relevant search terms. Study titles and abstracts were screened using inclusion criteria which resulted in 13 articles being selected for further analysis. The methodological quality of each study was assessed independently by three reviewers. Asymmetry was more commonly identified in kinetic variables than kinematic variables. The most common asymmetries identified were peak knee extension moment and peak vertical GRF, both of which were frequently shown to be significantly lower in the surgical limb compared to the uninjured limb. These findings suggest that return to sport criteria following ACL reconstruction should incorporate analysis of the asymmetry in loading experienced by each limb rather than examining movement patterns alone.