She started playing for the club SK Kammer at the age of 12 because of her seven years older sister Dagmar, who also is her role model.

[2] [3] As a junior, Sagerer decided to do an exchange year at Olentangy Orange High School, where the team ended up winning their first "District Championship" and played at the "Ohio State Semifinals", where they lost to the two-time defending State Champion team Twinsburg High School.

[4] As a senior, she averaged 14.4 points, 10.2 rebounds, 1.8 steals, and 1.8 block-per-game at The Rock School in Gainesville, Florida.

When Sagerer had her first career start, she scored 23 points, 18 rebounds, and 5 blocks, which helped her earn Atlantic Sun Newcomer of the Week and Swish Appeal Mid-Major co-Performance of the Night.

In addition to averaging 15.0 points, 7.8 rebounds, and 2.6 blocks, she received her master's degree in Business Administration.

[14] In 2017, she competed for the Austrian 3x3 women's national team to be part of the 2017 FIBA 3x3 Europe Cup qualifier.

After beating Switzerland, Chinese Taipei, and Italy, which was the world champion in the year 2018, the team still did not make it to the next round.