Ramkumar beat a fighting Timon Reichelt 6-4 6-3 while Mohit lost 7-6 2-6 2-6 to Korean Duck Hee Lee in his first round.
In Delhi also, Mohit had lost in first round and in Bhopal last week, he could not progress beyond second round.
Ashwin Vijayragavan scored a fluent 6-2 6-2 win over Jatin Dahiya but Ronit Singh Bisht had to work hard to beat Lakshit Sood 5-7 7-5 6-3.
Last week's winner and second seed N Sriram Balaji will open his campaign against unseeded Chandril Sood while top seed Jeevan Nedunchezhian faces wild card Prateek Pushkar Baxi tomorrow.