SAN FRANCISCO — Lawyers with Kirkland & Ellis are angling for the home-field advantage in a fight over technology used by the National Football League to track players' movements during games.

Silicon Valley-based Zebra Enterprise Solutions Corp. insists it pioneered the technology that allows the league to gather game statistics in real time. The company's opponent, Massachusetts-based Lynx System Developers Inc., claims Zebra stole the technology.

Lynx sued Zebra for claims including misappropriation of trade secrets, breach of contract and fraud in Massachusetts federal court in June. Zebra, represented by Kirkland & Ellis partner Adam Alper, struck back Thursday with a separate suit in Santa Clara County Superior Court, in an effort to move the fight closer to home.