USA TODAY Sports

There's a reason it's a cliche: On any given Sunday, any NFL team can beat any other. It was true last week when the heavily favored Minnesota Vikings lost to the Buffalo Bills. The same thing can happen in fantasy, so be vigilant -- even if your team is 3-0.

Fantasy rankings: Top players at each position

Before the Vikings and Rams kick off Week 4 in the NFL, Tony Holm of FantasySharks.com is here to answer your questions and offer his expert advice.

Click on the Cover It Live box below to check out a transcript of the discussion.