Olympic Predictions - Open for discussion

[m9rfighter]

My first round predictions, feel free to give your opinion on any of the matches!

Julien Benneteau v Mikhail Youzhny
John Isner v Olivier Rochus
Andreas Seppi v Donald Young
Lukasz Kubot v Grigor Dimitrov
Roger Federer v Alejandro Falla
Christina McHale v Ana Ivanovic
Serena Williams v Jelena Jankovic
Mona Barthel v Urszula Radwanska
Alize Cornet v Tamira Paszek
Denis Istomin v Fernando Verdasco
Viktor Troicki v Nicolas Almagro