@vrjuls I’m not a Dr but I will tell you what i think based on everything I have learned through this journey , light cardio exercise is OK with an aneurysm as I was told by my Cardiologist, keeping your body in good shape is actually important. The main thing to avoid is exercise that may raise your BP, (as it has been mentioned in the thread any exercise that will lead you to hold your breath while exerting), so I would think tennis at a reasonable intensity should be OK