Stephen Curry scored 50 points in a record-shattering performance Sunday to send the defending champion Golden State Warriors into the second round of the NBA playoffs while a Jimmy Butler ankle injury raised tensions for the triumphant Miami Heat.In Sunday's other playoff contest, Butler scored 25 points and grabbed 11 rebounds to lead Miami over the host New York Knicks 108-101 in their Eastern Conference second-round opener but suffered a right ankle injury.