Aditi won the opening Ladies event, the Usha Delhi Ladies at the NOIDA Golf course in April.
Aditi was in terrific form while winning the opening event in Delhi, but Mehar took some time warming and ended outside top-10.
But she is the defending champion here, so she would like to keep the title. But the KGA is also the home course for Aditi, who would like to make amends last year when she finished fifth.
Gauri Monga, who took a long time off from the game to focus on her school leaving examinations, is also in the fray. She did make a low-key comeback in Delhi Ladies, but she could now be a contender.
The strong field also includes Gurbani Singh and Millie Saroha, who were second and third in Delhi Ladies event. Also in the fray is Gursimar Badwal, who was fourth in the event.
There are more than 60 players in the field and they include Ladies and junior golfers.