The De La Riva guard is one of the most popular and useful guards positions. That being said the position can put a lot of stress and strain on your De La Riva knee. Especially if your opponent tries to push your De La Riva hook out while your also trying to sweep. A great alternative is to control the ankle or pant leg grip and instead of placing your De La Riva hook, you can just use your shin/knee to put pressure on your opponents legs. This will essentially work exactly the same with out putting strain on your knee.