Oct. 2—JAMESTOWN — Luke LeFevre loses track of time when he’s on the tennis court. “Usually when I hit in the offseason it won’t just be a quick hour of hitting, it usually goes for about three or four hours before I realize what time it is,” said LeFevre, a junior at Jamestown High School. LeFevre’s hours spent on the court might be the reason he’s the Jays’ No. 1 player this fall. “I knew …