Chung won their only previous meeting in March last year. he won in 3 sets on a hard court.
Granollers has no points to defend this week but he made the third round in Madrid last year. He will have to play the qualifying rounds this time which start in the next couple of days. It would make sense for him to cut this week short to be able to compete in Madrid.
Chung doesn’t have an amazing record on clay but has done reasonably well on the surface recently. I see some value on Chung. Granollers starts around 1.64 . A lay below 1.40 would seem a good entry.