Knee arthroplasty (KA) is increasingly performed, but rehabilitation and the possibility of returning to sports after KA are understudied areas. A web-based survey amongst physiotherapists was conducted to obtain insight in current rehabilitation methods and their return to sports advice after KA. 82 physiotherapists (62%) completed the survey. Broad agreement existed concerning important goals of rehabilitation, including the improvement of ROM, muscle strength, coordination and gait pattern. However, physiotherapists use a wide variety of treatment strategies to achieve these goals. Return to low-impact sports is mostly recommended, while return to intermediate- and high-impact sports is either advised against or considered impossible. The development of new evidence-based guidelines on physiotherapy after KA could lead to a more uniform approach in the rehabilitation for KA patients. Furthermore, investigating effects of individualization in the rehabilitation may prove valuable in optimising both patient outcomes and cost-effectiveness of this worldwide increasingly performed intervention.