Saina Nehwal said she can no longer overlook the fact that her career is in its final leg.
Sindhu, a two-time Olympic medallist, lost 17-21 16-21 to third seeded Chen in 43 minutes to end an impressive run in the Super 500 tournament.
In the final at St. Jakobshalle, the top seed defeated the Dane 21-15, 12-21, 21-14 in 47 minutes in their first career meeting. This is the first time an Indian male has won the title after compatriot Saina Nehwal clinched back-to-back women's singles crowns in 2011 and 2012.