Star Champion by Susan Grant

A girl with big dreams. On an impoverished world, Jemm drives trucks for a mining company by day, but at night she disguises herself as a male to compete in the violent underworld of the colony’s fight clubs. Every win puts her one small step closer to escaping Barésh with her family. When a royal prince recruits her to be a star player for his team, her ruse proves to be her most perilous game yet.
Prince Charming he was not. Klark is eager to reverse his reputation as the black sheep of his royal clan. If his bajha team can win the galactic title it would go a long way toward restoring the family honor that his misdeeds tarnished. He tracks down an amateur who has risen to the top of the seedy world of street bajha, offering the commoner a chance of a lifetime. But when her scandalous secret turns his beliefs upside down, he sets out to win a very different prize—his champion’s wary heart.

An all-new, stand-alone tale of two improbable lovers, their daring secret, and the gamble destined to alter the course of their worlds forever.
(Previously titled The Champion of Barésh)