The 29-year-old fired Brazil ahead during stoppage time at the end of the first half – but Monaco hitman Falcao would later level the scores as the game finished 1-1.
But it was the Chelsea winger’s goal that proved to be the story of the match, leaving viewers astounding after a clip of the strike made its way online.
PSG defender Thiago Silva started the move, finding Liverpool’s Philippe Coutinho with a searching ball over the top of the Colombian defence.
Coutinho’s first time pass found Willian perfectly in stride, teeing him up to blast an outswinging half-volley home into the top corner.
More than 180,000 people have seen the video since it made its way onto Reddit last night.
“He is not perfect. He is inconsistent,” said one Chelsea fan.
“When he has a bad game, he's awful. But if you cannot see how much Willian has improved since January 2015, you're blind to your anti-Willian agenda or you're just being stupid.”
Another wrote: “No matter who the goalkeeper, that would have gone in. Basically impossible to stop.”
It comes after reports that Alex Oxlade-Chamberlain snubbed a move to Stamford Bridge this summer after speaking with England manager Gareth Southgate.
The Telegraph claim the Ox decided to make the switch to Liverpool over Chelsea after a private conversation with Southgate.
