Heat oil in a large skillet over medium heat. Add zucchini and sauté until tender, about 10 to 12 minutes. Stir in the tomatoes, olives, capers, wine, herbs, 1/2 teaspoon salt and 1/4 teaspoon pepper. Bring mixture to a simmer and continue to simmer 5 minutes.
Place tilapia fillets on top of the tomato mixtures and season with 1/4 teaspoon salt and pepper. Cover skillet and cook over medium heat about 10 minutes (or until fish flakes easily), flipping fish over halfway through.