Titanic epic struggle with Del Potro today at Wimbledon. But Federer overcame many dangerous moments to finally prevail over Juan Martin Del Potro, 19-17 in the third set. It was the longest match of the tournament and for sure the most nerve-wracking. Del Potro, after losing the second set tiebreak, had the advantage to serve first in the final set and put himself in position to eliminate Federer but the determined Swiss refused to lose.Twice Del Potro had 0-30 edges on Federer but Federer, like a magician waving his wand, served his way out of trouble.Eventually, finally, Del Potro just couldn't keep up. Or maybe Federer just wants this gold medal more than any man in the entire Olympics. 19-17. Del Potro was obviously heartbroken after giving every ounce of his heart and soul. Both played amazingly well but in matches like this it comes down to who wants/needs it more. After being denied singles medals in his previous three attempts at the Olympics, Federer wants this one, perhaps more than anything he's ever won or competed for. This one, the Olympic gold medla in singles, has been the hardest, most elusive of all his titles. Now there is only one man in his path to overcome. Federer may need to play the best tennis he's ever played to win the last, missing achievement from his historic resume. The stage is now set for quite a fantastic gold medal singles match, wouldn't you say?