It also stretched the 29-year-old’s current winning streak to 18.
Del Potro, who defeated Novak Djokovic and Rafael Nadal on his way to the final, added the silver to the bronze he collected in London.
(Bein Sports YouTube)
Andy Murray added the Rio title to his 2012 triumph and to his Grand Slam collection of the 2012 US Open and 2013 and 2016 Wimbledon crowns.