Australian Open champion Madison Keys suffered a shock 6-4, 6-2 defeat in the third round of the Miami Open to Filipina teenager Alexandra Eala.

Wild card Alexandra Eala, 19, upset American fifth seed Madison Keys 6-4, 6-2 on Sunday to continue her dream run at the Miami Open, where she has now toppled two Grand Slam champions in consecutive rounds.

Alexandra Eala, 19, beat the American fifth seed 6-4, 6-2 to advance to the last 16 of the tournament Australian Open champion Madison Keys suffered a sensational elimination from the Miami Open at the hands of Filipino wild card Alexandra Eala on Sunday.