Congrats to Djokovic today. Just had a better game and conditioning today.
I'd still bet the field, but he looked good today in his quest to improve upon his 2008 Bronze.
Recall Federer never won Gold (edit: in singles, but he did in doubles) either, as Andy Murray saw to that in 2012. Of the "Big Four" only Andy (2) and Rafael (1) have won the Singles Gold Medal.