The highly-watched game dragged on into the evening, well after all other games had finished, lasting 5 hours. World No. 3 Humpy had no option but to concede defeat after 74 moves.
Harika is now sitting pretty on 5 points. Three players, including Humpy, are right behind her though, trailing by just half a point.
The young Hyderabadi was obviously thrilled with the victory despite the drain. "I got into a good position at the opening itself. I could either go for a win or settle for a draw at that stage," Harika said.
Harika agreed that her contests with Koneru always get extra attention but she insisted that there was nothing but healthy competition between the two.
"She is a great player and it's always a pleasure to play against her. We are two different individuals and instead of comparing us people should simply appreciate all that we are achieving," she said.
The 25-year-old said that she wasn't feeling tired at all despite going through such a tough and long game. She faces Stefanova Antoaneta of Bulgaria tomorrow while Koneru will take on former World No. 1 Pia Cramling of Sweden.