In 2016, Nanna played in 17 LET tournaments and won the Tipsport Golf Masters. In addition to this she secured a further 5 top-10 finishes and came sixth in the Order of Merit.
Nanna represented Denmark at the 2016 Olympic Games and had an impressive performance finishing T13.
In 2015, Madsen played her Rookie season on the LET. She competed in 16 tournaments and secured an extremely impressive 6 top-10s. Her best finish of the season was secured at the ISPS Handa New Zealand Women’s Open where she finished 3rd, shooting rounds of 67, 69 and 71. She finished the season in 9th position in the Order of Merit, winning €134,769.29.