Roger Federer, the seven-time winner and defending champion, did not participate in this tennis competition due to injury.
It would be the first time since 2005 that he would not play in the final in his hometown of Basel.
Federer had played in ten consecutive finals from 2006 to 2015.
Marin Čilić won the title, defeating Kei Nishikori in the final, 6–1, 7–6(7–5).