Preheat oven to 375 degrees F. Clean the whole duck and marinate with fresh lemon juice, salt and sugar mixture for 20 minutes, refrigerated. Place duck in a roasting pan with breast up. Bake for 45 minutes. Remove from oven and drain fat from the duck. Brush the duck with a half portion of red wine and roast the duck for 30 minutes. Drain the fat again and brush the rest of the red wine on the duck. Continue roasting the duck for another 30 minutes until the skin of the duck turns brown and crispy. Remove the duck from the oven, and remove the bones from the duck. Slice the duck into pieces and set it aside.