I just update my TFS 2010 + Sharepoint to TFS 2013 + Sharepoint foundation.
Everything is ok, I created a website, collections, documents and everything.
When I linked the TFS project collection to the website I noticed different website styles between the Sharepoint section (collections, libraries and so on ) and the project dashboard (it seems it is using the 2010 version). [take a look at the image above, left side]
There's a new "Issues" section that isn't related to TFS.
If I click "team web access" the 2013 version of TFS dashboard appears:
What am I doing wrong?