Ding Ning
At the 2009 European Championships in Stuttgart, Barthel and her partner Kristin Silbereisen won a bronze medal in the women's doubles match, and shared their triumph with the Eastern European duo Oksana Fadeyeva (Russia) and Rūta Paškauskienė (Lithuania). Four years later, Barthel captured a silver medal, along with Shan Xiaona, in the same tournament at the ITTF 2013 World Tour Qatar Open in Doha, losing out to the formidable Chinese duo and Olympic champions Ding Ning and Li Xiaoxia (8–11, 11–9, 7–11, 9–11).