I did acl surgery 4yrs ago, i did a second one 8 month ago and i've knee roughness. can i still play football or it can cause to me futur problems?

It depends: The majority of patients with acl tears have other damage to the knee at the time of the injury- either a mensical tear, bone bruise or damage to the cartilage that covers the femur or tibia. One's ability to return to sports must be individualized- how much pathology remains in the knee after acl surgery?, how effective was post-op rehab?- did you achieve full rom, your baseline strength, etc.