Bad news for Kiko. ACL sprains are tough because they generally don't heal much at all - there's not enough blood supply to the area, unlike the MCL which heals itself in a few weeks. A sprained ACL is usually just one more twist away from popping completely, and often they are stretched out - creating laxity which puts every other part of the knee at risk. The only thing you can do for it is to strengthen the rest of your knee and avoid dangerous things, like playing professional football for example. Otherwise, it's surgery. He will probably opt for a cadaver graft this time, which is riskier (sometimes the body rejects them and they just rot away), but there is no damage from harvesting your patellar tendon or hamstring for material as there would have been in his previous surgery.