Iowa State University tennis coach Michele Conlon says interest in the sport is on the rise, again. Conlon is conducting lessons this summer for players from ages four to 18.Conlon says after a drop in interest in tennis, it’s picking up again.Conlon says tennis has the same advantage as a sport like golf. It is an activity that can last a lifetime.Conlon says lessons are offered for players as young as four but there is no set age when someone should take up the sport.New lessons begin on July 10th.