Ndour joined the youth system of Gran Canaria in 2009. She also played in the Junior Spanish Championship that year. Ndour became a naturalized Spanish citizen in 2011. She was a part of the Spanish youth team that won the silver medal at the 2011 FIBA Under-19 World Championship for Women where she nearly averaged a double-double. As a member of the Spanish Youth National Team, Ndour's teams always won a medal in each tournament she played, including the bronze medal at the Under-18 European Championship for Women.