World number one Carlos Alcaraz is knocked out of the Miami Open after a surprise 6-3 5-7 6-4 defeat to Sebastian Korda. World number one Carlos Alcaraz was knocked out of the Miami Open in the third round after a surprise 6-3 5-7 6-4 defeat by Sebastian Korda. Top seed Alcaraz, 22, produced a sloppy first set which gave the American the early initiative but Korda look... [2151 chars]