Fighting in her third bout of the tournament, Nikhat needed less than three minutes to notch up a facile RSC (referee stops contest) win over Nassar Hanan of Jordan in the quarterfinals.
The high-scoring bout ended with a technical superiority win for the Indian, who became the first Indian wrestler -- male or female -- to lock a quota for the next year's Games.
She later outplayed Poland's Roksana Marta Zasina by technical superiority to move into the quarterfinals.
'Djokovic is also more successful because he has had a level of fitness/physique that has allowed him to play more than me,' added Nadal.
The 25-year-old Chopra on Sunday became only the third javelin thrower in history to hold both the Olympic and World Championships crowns after winning the Worlds title in Budapest.
At 31, the Thiruvananthapuram native is now India's biggest medal hope at next year's Paris Olympics.
The 21-year-old, who had earlier this month won gold in her favourite event at the World University Games in Chengdu, qualified for the final with a national record score of 589.
Made with a lightweight polished steel and with a champagne colour, the torch's lower half features a relief pattern that mimics the movement of the Seine, along which the Opening Ceremony will be held before more than half-a-million spectators.