Sindhu, who had won the coveted World Championship gold medal here in 2019, couldn't match the speed and accuracy of Marin during her 12-21 5-21 defeat in the final
Jayaram, who currently has a world ranking of 60, beat the 12th ranked Gemke 21-18, 17-21, 21-13 to set up a match against Thai eighth seed Kunlavut Vitidsarn.
Olympic silver medallist Sindhu expectedly outclassed Malaysia's world no. 92 Kisona Selvaduray 21-10,21-12 in a lop-sided second-round contest that lasted just 35 minutes