Tennys Sandgren upset world No. 22 Lucas Pouille in Stockholm with an exclamation point for good measure. The American's  6-4, 6-4 win was capped off with a perfect backhand down-the-line winner on match point.

It's Sandgren's best win, by far, since his run to the Australian Open quarterfinals, where he stunned the likes of Stan Wawrinka and Dominic Thiem.

He'll play world No. 193 Oscar Otte for a spot in his first quarterfinal since May.

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Sandgren fires off
hot shot on match
point in Stockholm

Sandgren fires off hot shot on match point in Stockholm

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