Kei Nishikori was the defending champion, but chose not to participate this year.
Second-seeded
Gaël Monfils
Gaël Sébastien Monfils (; born 1 September 1986) is a French professional tennis player. He has been ATP rankings, ranked as high as world No. 6 in men's singles by the Association of Tennis Professionals (ATP), achieved in November 2016. Mon ...
won the title, defeating
Ivo Karlović in the final: 5–7, 7–6
(8–6), 6–4.
Seeds
All
seeds receive a
bye into the second round.
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
Qualifying
Seeds
The top four
seeds received a
bye into the qualifying competition.
Qualifiers
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
References
Main DrawQualifying Draw
{{DEFAULTSORT:2016 Citi Open - Men's Singles
Citi Open - Men's Singles