Roberto Firmino delivered one of his finest performances in a Liverpool shirt during the 5-1 win over Arsenal.

The Reds extended their lead at the top of the Premier League at the weekend, thrashing Arsenal on their visit to Anfield with Firmino bagging himself a hat-trick.

And despite notching up 56 goals across 168 appearances for the club, it marked his first treble in English football and he bagged the Man of the Match award to boot.

His first strike came under somewhat fortunate circumstances with a botched Arsenal clearance beating Bernd Leno, so he didn't have to.

Nevertheless, Firmino still found the time to produce his trademark no-look finish, tapping home and drawing the scores level.

Firmino's hat-trick vs Arsenal

There was no luck about his second goal, however, as he danced his way past Shkodran Mustafi and Sokratis Papastathopoulos before delivering a sound finish.

As for the hat-trick goal, he had Mohamed Salah to thank as the Egyptian gave Liverpool's second penalty of the match to his strike partner, a gesture Firmino was sure to repay by scoring.

So, all in all, it was a pretty incredible evening of work for Firmino and it's not just Liverpool fans who will be buzzing about the result.

Firmino's new bonus

That's because Firmino's bank balance will be feeling the benefits of his treble, as revealed by the Mirror and the data collected by Football Leaks: The Dirty Business of Football.

The report states that Firmino earns a basic wage £68,085-a-week, but a series of bonuses come into effect whenever he scores for Liverpool.

He earns £25,000 for each of his first five goals in a season, £45,000 for strike number six to ten, £65,000 between goals ten and 15 and £85,000 for any strikes beyond that.

So what? Well, that means he earned an eye-watering £135,000 for scoring a hat-trick against Arsenal.

That's right, he earned more in one night than many will earn in several years of work. Not bad.

It also makes it all the more philanthropic that Salah decided to pass on penalty duties to Firmino, who suddenly became £45,000 richer because of his generosity.

Numbers like that are certainly staggering, even in the world of modern football, but Liverpool fans won't mind with Firmino delivering such a Christmas cracker.

It hasn't been a vintage season from the Brazilian so far but his recent performances - crowned by the Arsenal treble - send an ominous message to opponents in 2019.

There's every reason to suggest Firmino will be earning more and more from his bonuses in the weeks and months to come.

It will be a long time before Arsenal wake up from their nightmares of him.

How many goals do you think Firmino will score this season? Have your say in the comments section below.