#3 Del Potro knows what it takes
Nine years ago, it was a shocking night under the lights at Arthur Ashe Stadium.
Roger Federer was competing in a sixth straight US Open final after winning the past five tournament deciders.
It was, without doubt, the man from Switzerland would be the hot favourite to lift the trophy once more.
On the other side of the court was a 20-year-old Del Potro. Not only was Federer against him but so was the majority of the Arthur Ashe crowd of over 20,000 fans.
Over four hours later, Del Potro pulled off a stunning win to end Federer's winning that started in 2003.
A five-set match that the Argentine may want to look back at ahead of his latest encounter with Djokovic.
Del Potro knows deep down he can do this.
His previous runner-up achievements include last year's Us Open final and the 2016 Olympic Games, he just needs to push a little bit more to get his hands on a glittering trophy.
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