In 2013 Ludwig formed a beach partnership with Kira Walkenhorst. The pairing was successful, with bronze medal finishes at the 2013 and 2014 European beach volleyball championship, and gold medals at the 2015 and 2016 Beach ECH. Ludwig and Walkenhorst won the gold medal at the 2016 Summer Olympics, defeating Brazil's pair of Ágatha and Bárbara in straight sets of 21-18 21–14 in the final.