Hi, that's not how AD network works, think of it like that, your airspace is divided into various three commands, northern, central and southern and then there's the air defence command, each command is subdivided into various sectors with their own sensors and offensive weapons, all the data from your airborne assets and ground based sensors is being studied in near real time, when an incursion is detected, the air defence command prioritizes it and assigns it to nearest asset be it a sam site or a flight of interceptors whichever is near,
The thing that made Indians hightail weren't fighters, it was the fact that they had been painted by one of the many radars in our air defence network and were being tracked.
One more thing a radar track/lock from the enemy is enough to make anyone lose their nerves.