#BTNLive asks: Which team faces biggest Week 4 test?

If you're on Twitter, you can vote in our ongoing series of Big Ten Twitter polls for our weekday TV show #BTNLive weekdays at 6 p.m. ET. On today's show, our experts discuss this question as Week 4 approaches: Which Big Ten team faces the biggest challenge this weekend?

Select your choice below and tweet out your vote. Anytime you use one of those hashtags, you cast a vote. Spread the word. We'll be tabulating the hashtag totals all day and throughout the show. The hashtags again are:

• #PurvsWis
• #MSUatND
• #IUvsMizzou

Update: Thanks for voting. This daily poll is now closed.