Sunday Chicken Ragu

Name: Sunday Chicken Ragu
Ingredients: 2 pounds chicken thighs, boneless, skinless, cut into1-1 1/2 pieces; 3/4 inch piece of pancetta, small dice; 3 tablespoons EVOO; 1 tablespoon butter; 1 sprig thyme leaves removed and minced; 1 tablespoon fresh sage, minced; 1 1/2 teaspoons rosemary, minced; 2 large shallots, minced; 1-2 garlic cloves, minced; 1 carrot, peeled and finely diced; 1/4 cup celery, finely diced; 3/4-1 cups light dry red wine; 1 pint cherry or grape tomato assortment, halved; 1 15 ounce can diced tomatoes, drained (save juice); Salt and pepper to taste; Final tablespoon of butter to finish