 Complete the following phrase:  He won a bronze medal in the K-2 500 m event at the 2009 ICF Canoe Sprint World Championships in Dartmouth. At the 2012 Summer Olympics, he competed in the Mens K-4 1000 metres, finishing in 4th place with the team in the final. Gross teamed up with Max Rendschmidt to win the K-2 1000m at the 2013 World Championships and the 2013 European Championships. They defended their European title in 