One key aspect of prestressed carbon fibre-reinforced polymer (CFRP) tendons in direct bond with high performance concrete (HPC) are the properties of the bond in the transfer zone. Bond-slip-behaviour has been widely studied in the past by pull-out experiments with a focus on the surface treatment of the tendons, e.g. smooth surface, ribbed, braided or sand-coated or of stranded tendons. In those studies, mainly the force and the slip at the free end was measured. In contrast to that, we focused in this research project on sand-coated CFRP tendons prestressed up to 1700 MPa, where distributed fibre optical sensors (DFOS) were integrated in the CFRP tendons. The integration of the optical fibre did not affected the bond. This allowed to measure the strain distribution in the transfer zone with a high spatial resolution. Furthermore, the axial tendon strain of the prestressed structures were monitored for up to 1 year. Prismatic samples with different concrete cover, prestress level and time to release were produced and their load transfer zones monitored. In addition, by varying the dimensions of the prisms, the minimal required concrete cover to sustain the complex stress field in the transfer zone was determined. This allows to fully exploit the advantage of the non-corroding CFRP tendons, resulting in lighter structures. The reliability, accuracy and robustness of the integrated optical fibre was proven. This study gives a novel insight into the long-term stability of the bond in the transfer and anchorage of pretensioned, sand-coated tendons in combination with prisms made of HPC.