Diacci competed at the 2010 European Championships alongside Giulia Steingruber, Ariella Käslin, and Jennifer Senn, and they finished 6th in the team final. She won the bronze medal on the floor exercise at the 2010 Cottbus World Cup behind Kristina Vaculik and Marta Pihan-Kulesza. She then competed at the 2010 World Championships with Ariella Käslin, Giulia Steingruber, Jennifer Senn, Linda Stämpfli, and Jennifer Rutz, and they finished 16th in the qualification round. She also competed at the 2011 World Championships where the Swiss team finished 18th.