Those are two fixtures Scarlets will have a very close eye on.
They aren't in action until Saturday evening, and by then their top-eight spot may already be secured.
Dwayne Peel's side know a single point at the Sharks would be enough to extend their season.
Even if they get nothing, Scarlets will qualify for the knockouts if Edinburgh fail to get maximum points and either Cardiff or Munster lose.
If Benetton pick up two losing points and Scarlets achieve no points, it would come down to points difference - and Scarlets have a 130-point advantage over their Italian rivals as it stands.