European Champions Cup: Sunday's team news and previews

The European rugby season is under way, with a full round of fixtures in both the Champions Cup and Challenge Cup this weekend.

Here are match-by-match previews for Sunday's matches.

All kick-off times BST

European Champions Cup

Gloucester v Castres (13:00)

Lyon v Cardiff Blues (13:00)

Glasgow v Saracens (15:15)

Toulon v Newcastle (15:15)

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