Meaning of 勝敗鍵握 in Japanese

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Definition of 勝敗鍵握

にぎる(nigiru) 【握る】

(v5r, vt) to clasp; to grasp; to grip; to clutch
彼らが眠っている間私がハンドルを握った。
I took the wheel while he slept.
to make (nigirizushi, rice ball, etc.); to form; to press into shape; to mold; to mould
to seize (power, etc.); to take hold of

かぎ(kagi) 【鍵 ·鑰】

しょうはい(shouhai) 【勝敗】

(n) victory or defeat; issue (of battle); outcome
勝敗は問題ではない。
It doesn't matter whether you win or not.

けん(ken) 【鍵】