Here we go again.. Wawrinka up against a other frenchman!!!
Both players are good on this surface and the recent head to head record is 3-2 in favor of Warinka.
However recent form I'm going for a Tsonga win. SO far Tsonga has breezed through to this stage dropping 2 sets, easily defeatings Fognini in the last round 3-0.
Warinka has had to battle hard to get to this stage and isn't playing great tennis, going to 5 sets with Cipola and Giles Simon. So going by form I'm going to stick with Tsonga to be fresher and progress to the next round and level the overall head to head at 3-3.
Good luck!