Bayern are eager for Gnabry to sign a new contract and are prepared to sell the Germany winger if he refuses.
The German giants held a round of talks with Mane's agent last week, says Kicker, and will move for the Senegal international should they be forced to sell Gnabry this summer.
Mane has a deal to 2023 with the Reds and has seen new contract negotiations stall.
Along with Bayern, Barcelona are also interested.
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