Who Am I ???

*I was born and bred in a country not known for horse racing, which is even more the case now. *I won races in four different countries and three different continents. *My sire was unraced, but he had the breeding of a champion and became a leading sire. *I won my final eight races all of which were strakes races. *In each of my defeats I finished 2nd and they were both in my native continent. *I was undefeated in my short career in the United States. *I won races between 5 furlongs and a 1 3/8 miles and all of my races were on the same surface. *After my retirement, I was bred in both Europe and the United States. *I was a champion at three in one country and then a Horse of the Year in a different country at four. *Big things were expected of me in the United States, but minor injuries kept me away from fulfilling those goals. *My final race was in Louisville, Kentucky under the twin spires. You should know by now … Who Am I ???