The De La Riva guard is a great answer to people opening your closed guard. You can still control the movements of your opponent with this open guard, as long as you use the correct control points. You will need to have a 3 point control system. These 3 points are usually, but not limited to, the DLR hook on the leg with both sleeve grips, the DLR hook with one sleeve grip and an ankle grip on the same side as your hook, the DLR hook with one sleeve grip and a collar grip, or the DLR hook with one sleeve grip and a belt grip. You can have different grip sets but you will always want to have the 3 point control system in mind when playing this guard.
Below is are two DLR drills that we use a lot. The first, is a two sleeve entry set up drill. This drill will help you move your hips correctly and learn to control the opponents leg with the DLR hook. The next drill is a DLR sweep set up drill, this will teach you you sit up with the correct posture and make it easier for you to control your opponents posture with the grips. As with all these drills you must DRILL THEM! Even if you grab someone for just 5 mins at the start or end of each class you should be able to knock out 10 to 20 good reps. with ease.
“Drilling Is The Key, So Just Do It!”