Some bad news, good news ...
The bad news -- Lindsey Vonn says she's "just friends" with "Vikings" star Alexander Ludwig.
The good news -- she's "open-minded" about letting him out of the friend zone.
31-year-old Lindsey and 23-year-old Ludwig got people talking last week when they left Craig's in L.A. together lookin' pretty damn couply after a fancy dinner together.
But Vonn says there's no official relationship ... yet ... saying she barely knows the guy.
Here, Lindsey ... maybe this pic will help change your mind.
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