Why didn't Chelsea make it to the last 16 if they had the same amount of points like Shakhtar Donetsk and a better GD?
Chelsea had a better Goal Difference than Shakhtar, but they did
not have as many points. Juventus had the same amount of points as
Chelsea, but Chelsea had the inferior head-to-head record. (they
tied and lost to juventus). Thus, Shakhtar and Juventus advanced,
and Chelsea did not.