Dreaming of winning a contest whether it is racing, swimming or fighting indicates your deep desires to win by expending all your focus and energy at competing. You will not only win, but success will follow your career and relationships. You create your own luck by being competitive.
Win a contest in a dream signifies opportunity knocking on the door that would help you improve, cross over boundaries or transform in something very positive. It signifies your strong determination to achieve certain objective or a desire that is powerful enough to manifest itself into reality.