X Marks The Spot

While playing on a clay court, Michelle’s partner called a serve that landed close to the service line “out” as Michelle returned the serve with what would have been a clear winner. Michelle’s partner decided to check the mark left by the serve and saw that the serve just barely hit the line.

What should happen?

Since Michelle’s return was a clear winner, the point belongs to her team.

Since the serve did hit the line, the “out” call should be overturned, and the point belongs to the server’s team.

Since the serve was called “out,” but then the call was reversed, the point should be replayed.

I'm not sure.