Yesterday I was playing a match with a friend just for fun. No tournament. No league. Not even a motivational bet/wager. Anyways, I hit a shot that I thought would set-up an easy point-ending volley. Much to my surprise, as I was charging forward to the net, my opponent returned the ball with a lot more juice than I thought he would be able to get on it. The ball flew past me and by the time I got my head turned to see it, the ball had already landed somewhere near the baseline and was heading for the back fence. I immediately told my friend I didn't see it land. I knew the ball hit somewhere around the baseline area, but whether it was in or out I still didn't know. I asked my opponent and he said he couldn't see the ball because I was in his line of of sight. We simply shrugged our shoulders and decided to replay the point. It's been quite a while since I played H.S. tennis, or in any league. What is the correct way to handle this? Would I lose the point since I'm responsible for making calls on my side of the court (which I failed to do for this point)? Or would our replaying of the point be a correct way to handle it if this had occured in a H.S. or league match in which the players don't have benefits of having line judges? After thinking about it, I think I lose the point, but I want to know for sure. Thanks.