How to counter Viego
Let us take a look on how to beat Viego. We will look at champions who are strong against Viego and who are weak against Viego. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Jungle champion who counters Viego. You can already win in champion select with the right counters for Viego. If you want to know how to counter Viego then you need to take into account the best picks vs Viego and the worst picks vs Viego. This Viego counter data is based on matches played by Pros on patch 14.21 and previous ones. It is important to see whether Pros counter picked Viego or whether they played as Viego.
Champions used by Pros to counter pick Viego
Looking at the matches from Pros (see table Pros counter picked Viego) we can see that they picked 
Lee Sin most often to counter pick Viego. The matchup Lee Sin vs Viego occured 274 times. Viego has 156 wins and 118 losses in this matchup. Learn how to counter pick Lee Sin to get another perspective on the data.
Lane outcome for Viego
When looking at Viego 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 Viego. The lane outcome of Viego consists of three outcomes: Win, Loss or Draw. Let's take a look of Viego 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 Viego.
Conclusion
Analyze the available data and learn how to beat Viego. To master Viego take also a look on Viego builds and runes for Viego. Good luck, Summoner!