Grzybowska was born in Poznań, Poland. She won the Juniors singles competition at the Grand Slam tournament 1996 Australian Open. She also competed for Poland in the 1996 Olympics in Atlanta, where she lost in the first round.
Since then, until her knee injury in 1998, she managed a rather successful career, culminating in the 30th position in the cumulative WTA ranking for that year, the highest ever standing for a Polish woman.
Her attempts to resume competition were ultimately unsuccessful and she retired at the age of 24 in 2002.