The management of the long-term sequelae of coronavirus disease 2019 (COVID-19) infection, known as post-COVID-19 syndrome (PCS), continues to challenge the medical community, largely owing to a significant gap in the understanding of its aetiology, diagnosis and effective treatment. To examine general practitioners' (GPs) experiences of caring for patients with PCS and to identify unmet care needs and opportunities for improvement. This study follows a qualitative design, using in-depth semi-structured telephone interviews with GPs (N = 31) from across Germany. Interviews were audio-recorded, transcribed verbatim and analysed using qualitative content analysis. GPs reported that they were often the first point of contact for patients with persistent symptoms following SARS-CoV-2 infection, with symptoms typically resolving within weeks. While ongoing symptomatic COVID-19 is perceived to be more common, the relevance of PCS to GP practices is considerable given its severe impact on patients' functioning, social participation and the substantial time required for patient care. GPs coordinate diagnosis and treatment but face challenges because of the unclear definition of PCS and difficulties in attributing symptoms, resulting in a cautious approach to ICD-10 coding. Interviewees highlight lengthy diagnostic pathways and barriers to accessing specialist care. The findings confirm the high functional limitations and psychosocial burden of PCS on patients, and the central role of GPs in their care. The study suggests a need for further research and health policy measures to support GPs in navigating diagnostic uncertainty, interprofessional communication and the limited evidence on effective treatments.