How to counter Vladimir
Let us take a look on how to beat Vladimir. We will look at champions who are strong against Vladimir and who are weak against Vladimir. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Mid champion who counters Vladimir. You can already win in champion select with the right counters for Vladimir. If you want to know how to counter Vladimir then you need to take into account the best picks vs Vladimir and the worst picks vs Vladimir. This Vladimir counter data is based on matches played by Pros on patch 15.3 and previous ones. It is important to see whether Pros counter picked Vladimir or whether they played as Vladimir.
Champions used by Pros to counter pick Vladimir
Looking at the matches from Pros (see table Pros counter picked Vladimir) we can see that they picked 
Viktor most often to counter pick Vladimir. The matchup Viktor vs Vladimir occured 11 times. Vladimir has 7 wins and 4 losses in this matchup. Learn how to counter pick Viktor to get another perspective on the data.
Lane outcome for Vladimir
When looking at Vladimir counters you will notice that win rates alone are not conclusional. Therefore we provide an overview (see table Lane Outcome) where you can see the lane outcome of Pros who played Vladimir. The lane outcome of Vladimir consists of three outcomes: Win, Loss or Draw. Let's take a look of Vladimir lane and match outcome for specific matchups. Considering the lane outcome and the match outcome of a specific matchup, might enable you to find the right counter for Vladimir.
Conclusion
Analyze the available data and learn how to beat Vladimir. To master Vladimir take also a look on Vladimir builds and runes for Vladimir. Good luck, Summoner!