More than a third of shoppers in the physical entertainment market bought a product with the online retailer Amazon in the 12 weeks to 3 June.
Tesco’s overall sales fell 0.5% in the entertainment sector, meaning its market share dropped slightly to 15.2%.
Sales of CDs more than six months old grew by 9% year on year, helped by Prince and Bowie.
Online spending on films, music and games in the UK has bounced back, thanks to Star Wars: The Force Awakens and consumers buying the back catalogues of David Bowie and Prince.