The 17-year-old Abhimanyu subdued China's Sheng Tang 6-2 6-2 and later battled past Korea's Minjong Park 3-6 6-3 6-3 in a gruelling match to top Group I and qualify for tomorrow's final.
Abhimanyu, who was a last-minute replacement of injured Siddanth Banthia, will now fight it out with Group II winner.
Banthia, winner of the Indian leg of Rendez-Vous, had pulled out of the event due to an injury. Since Abhimanyu had ended a runner-up to Banthia, he made the cut for the event.
Playing her first ever tournament outside India, Malikaa took some time to settle and gradually gained confidence. She was routed 1-6 0-6 in the first match by Japan's Anri Nagata and went down fighting 6-7(5) 5-7 against Brazil's Nathalia Wolf Gasparin.
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Bengaluru's Abhimanyu, who till recently trained with former Davis Cupper Vishal Uppal in Delhi, had landed in Paris only yesterday morning but got himself attuned to the conditions quickly.
After having just one practice session with coach Vivek Satyajit, sent by AITA to help the Indian players, Abhimanyu came out firing against the Chinese, who looked bothered by the heat but Park proved to be a tough nut to crack.
Abhimanyu though was rewarded for his tenacity and retrieving ability. His never-say-die-spirit kept him in the hunt and eventually he crossed the line.
Abhimanyu is first Indian to qualify for the Rendez-Vous final as in the 2015 and 2016 editions none of the four Indians - Basil Khama, Sathwika Sama, Adil Kalyanpur, and Mahak Jain - could make the cut.
"After 3-3 I knew I had it. First set I was doubting myself. I was not feeling it right. I stayed calm in the second set at 4-3 that broke his rhythm," Abhimanyu said.
"It's going to be a battle tomorrow," he said.
Malikaa had several chances to win her second match as she was up 5-2 in the opening set and 5-3 in the second but her unforced errors allowed the Brazilian to make a comeback.
Coach Satyajit said, "She needs to work on her physical aspect. She needs to be stronger. And she was ill-prepared for the event.
"Ideally AITA should have conducted a one-week clinic before she came here. She hardly played matches on clay. It's hell of an opportunity to grab a place in the Grand Slam main draw and she could have done better if better prepared.