Here is a link to the U. S. Senate primary results. It's a big field for the Democrats. Lamar Alexander is unchallenged. Well, he's challenged in a lot of ways, but he is unopposed in the primaries.
Here are the results for the two primary challenges to incumbent Republicans in the U. S. House, Marsh Blackburn in TN-07 and Zach Wamp in TN-03. Which would be more fun to see lose? Ok it would be Blackburn.
Here is the Department of State website, but their results page is not active yet.
Update: There is also a challenge to Lincoln Davis, incumbent Democrat in U. S. House (TN-04). Those results are also on the House primary link above.
There is another diary doing results for the U. S. House primary in TN-09 (Thanks to Turtle Bay)