Despite I'm training 3 times a week regularly by 1 hour each, I was expired and exhausted completely and almost was dead yesterday since had a match continuing 2 hours 10 minutes. Believe, we played only 2 sets: 3:6, 6:2 finally. Almost in all games there was Duce. We agreed also for tie-break after 1:1 in sets but I refused since I didn't have any strength to stay on the court any more. Today my all muscles everywhere in the body hurt me. I imagined myself PROs staying on the court sometimes 4-5 hours, AND THIS IS happening every day say on some tournament, they must play every day. From my opinion this is unbelievable, this is so hard ! Imagine amateur box - 9 minutes, Professional box is around 36 ( or 60?) minutes, wrestling and etc. In all these 2 men sports sportsmen are concentrated completely for shorter period than in tennis. I'm not talking about team sports where you are not alone so the tension is not probably so high. Tennis is impossibly hard and probably the hardest sport. Isn't ?