Methods, systems and apparatus for monitoring and assessing the orthopaedic performance of a patient are described. The method can comprise implanting at least a first and second RF wirelessly detectable markers in first and second bones associated with a site. A procedure can be carried out on the site and the positions of the first and second markers can be detected after the procedure has been completed. The detected positions can be used to assess the orthopaedic performance of the patient. An orthopaedic monitoring system comprises a monitoring station including a tracking system for RF wirelessly detecting the positions of markers within a working volume of the monitoring station. A computer control system is configured to determine a marker position for each of a plurality of markers implanted in a patient located in the working volume. The computer control system also generates an indication of the orthopaedic performance of the patient from the marker positions. The computer implemented method comprises identifying each of the plurality of markers, determining the positions of each of the markers and using the positions of the markers to generate a representation of the orthopaedic performance of the patient.