Van der Merwe out, Ritchie startspublished at 12:20 British Summer Time 31 May
Bulls v Edinburgh (12:30 BST)
Duhan van der Merwe is the big miss for Edinburgh, as Sean Everitt makes just one change to his capital side.
Jamie Ritchie, who will join Perpignan this summer, starts at blindside flanker as Ben Muncaster drops to the bench from the team that beat Ulster to clinch a play-off spot.
Scotland wing Van der Merwe, who has been sidelined since March with ankle ligament damage, has resumed training and is with the squad in South Africa.
But Everitt said: "He's probably still a few days away from being ready to return to full match action. We're managing his return carefully to ensure he's fully prepared when he does step back onto the field."
