Table:
text: Viktor Troicki
vs. top 10
vs. top 10
Opponent Highest_ranking Matches Lost Win_
Lleyton Hewitt 1 2 0 100%
Juan Carlos Ferrero 1 1 0 100%
Andy Roddick 1 3 2 33.33%
Novak Đoković 1 14 13 7.14%
Carlos Moyá 1 1 1 0%
Roger Federer 1 2 2 0%
Rafael Nadal 1 4 4 0%
Andy Murray 2 5 5 0%
Ivan Ljubičić 3 4 2 50%
Nikolay Davydenko 3 3 2 33.33%
David Nalbandian 3 5 4 20%
Nicolas Kiefer 4 1 1 0%
Robin Söderling 4 1 1 0%
David Ferrer 4 3 3 0%
Juan Martín del Potro 4 6 6 0%
Jo-Wilfried Tsonga 5 6 3 50%

text: Viktor Troicki
vs. top 10
vs. top 10
Opponent Highest_ranking Matches Lost Win_
Tommy Robredo 5 4 2 50%
Rainer Schüttler 5 5 2 60%
Nicolás Lapentti 6 2 0 100%
Tomáš Berdych 6 5 4 20%
Gilles Simon 6 5 5 0%
Richard Gasquet 7 4 2 50%
Mardy Fish 7 1 1 0%
Gaël Monfils 7 3 3 0%
Mikhail Youzhny 8 5 2 60%
Radek Štěpánek 8 8 5 37.50%
Janko Tipsarević 8 3 2 33.33%
Jürgen Melzer 8 4 3 25%
Marcos Baghdatis 8 4 3 25%
Guillermo Cañas 8 1 1 0%
John Isner 9 4 1 75%
Marin Čilić 9 7 5 28.57%
Stanislas Wawrinka 9 2 2 0%

Question: What is the biggest number lost to David Nalbandian with a 20% win rate for Viktor Troicki compared to the top 10?