Papadakis and Cizeron teamed up when they were about 9 or 10 years old in Clermont-Ferrand at the suggestion of her mother, Catherine Papadakis, who coached them from the beginning of their partnership. They debuted on the ISU Junior Grand Prix series in 2009–10, placing 15th at JGP United States. They were 22nd at the 2010 World Junior Championships.