WWW: Sparkassen Open
So, there have been a handful of upsets this year in Braunschweig already, and surprising results. Now onto the quartefinals, the draw looks very interesting. Who do you all think wins this big challenger from here?
Jan-Lennard Struff GER [WC] vs Bjorn Phau GER 
Tobias Kamke GER  vs Horacio Zeballos ARG 
Simone Bolelli ITA vs Roberto Bautista-Agut ESP
Jan Hajek CZE  vs Thomaz Bellucci BRA