Has there ever been a more universally popular tennis player than Juan Martin del Potro?

The 28-year-old Argentina has a remarkable habit of getting everybody on his side, and he whipped another crowd up into a frenzy on Monday night with his sensational comeback win over Dominic Thiem at the US Open.

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Two sets down and struggling with illness, Del Potro looked dead and buried.

But that’s when he’s at his most dangerous. And – with the help of his other worldly forehand – he proceeded to produce a remarkable comeback to set up a quarter-final meeting with Roger Federer.

And to Fed’s great credit, he lead the plaudits on social media for the likeable Del Potro.

Del Potro’s brilliant tennis in the final three sets was impressive enough.

But taken in the context of his disastrous first two sets (in which he won just three games) it was even more remarkable.

And the extent of that turnaround wasn’t missed by some of the more inventive Twitter wags.