Po began playing at the age of nine years of tennis.
Her biggest success was Po at the Wimbledon Championships in London in 2000. Here she won at the side of her partner Donald Johnson, the third Grand Slam tournament of the year in mixed doubles. The two beat Lleyton Hewitt and Kim Clijsters in straight sets. In 2001 she was again in the final of a Grand Slam tournament: the final of the women's doubles at the U.S. Open but she had lost, as in 1999 already the local mixed- finals.