Del Potro vs David Ferrer prediction

It would be very trick and misleading if you look through their previous meetings between Del Potro and Ferrer. Del Potro has made an amazing return to the Top Level of tennis. His Olympic tennis adventure was dramatically ambitious and emotional. He lost to Murray 3-1 but played well. He just needs to improve backhand to be in elite players. But there is no doubt that how he is good at serve and flat hits. He has remarkable 91 hold percentage and passed Diego and Johnson very easily in previoust stages. Ferrer is about to drop his ranking points month by month. Moreover, he is having fitness issue at the moment. He is coming off a 5 sets match against Fognini when he could lost the match. Ferrer is unlikely win this type of matches when he priced huge underdog. Odds are low but I expect an easy victory by Del Potro.