Career
He reached his career-high singles ranking of World Number. 350 in October 2013. Kern made his Association of Tennis Professionals World Tour debut in 2011, when he was given a wild card into the main draw of the 2011 MercedesCup. There, he lost in the first round to Fabio Fognini in straight sets.
In 2012, Kern was again awarded a wild ward into the main draw of the MercedesCup, where he lost to Thomaz Bellucci in the first round.
In 2013, he received a wild card into the MercedesCup for the third consecutive time, losing to German qualifier Nils Langer 6–3, 4–6, 3–6 in the first round. Singles (7–3).
