**Leinster’s quest to become the most prolific winners of the Heineken Champions Cup in history takes them to La Rochelle for a semi-final clash on Sunday.** Leo Cullen’s side currently sit on four titles – a record they share with Toulouse – and last lifted the trophy in 2018. Standing in their way are TOP 14 outfit La Rochelle, who have never before been this far in the competition. **The breakdown** This will be the first meeting between the sides in European competition but six of Leinster's last seven appearances in the semi-finals of the Heineken Champions Cup have come against French opposition - winning three and losing three.