Del Potro J. vs Murray A. prediction

This Olympic Games were a little bit funny because the favorite no 1, Djokovic, was eliminated from the first match by Del Potro. It wasn't fair because Del Potro is on 141 ATP but in reality he is top 10 ATP. I mean this guy is the one that has the most wins against Djokovic. People forgot that this guy was no 5 ATP and to be honest he can do better and soon he will be again in top 10. Del Potro already won against two players from top 5 and if he will win against Murray that should be...amazing. Anyway, I'm so happy because he won against Nadal because he deserve that win but I must to admit that Nadal was tired because he had two hard games yesterday and in on of it ( in the double match) he got the Olympic's gold next to his partener Lopez M winning in three sets against team Mergea F./Tecau H. This final will be with a winning sistem of 3 from 5 sets and I know that it will be a long long match. I will pick a risky bet today but I believe that Del Potro has to remember how is to be the best player from a tournament. We also must not forget that in the last match against Murray, Del Potro won with 2-1 winning the 2'nd and the 3'rd set easily. So... my bet for this match is a win for Del Potro because he is an amazing player and a great character.