While Chelsea fans will have watched Olivier Giroud putting Sevilla to the sword with utter delight on Wednesday, those Arsenal supporters who caught the game must have been watching through their fingers.

Because what they’d give for a striker capable of scoring two goals in a game at the moment, let alone double that amount.

And here was a former player doing just that to secure top spot in Champions League Group G for the Blues.

What’s more, he did it with the perfect left foot, right foot, header and penalty combo, too.

Chelsea boss Frank Lampard embraces Olivier Giroud after his heroics against Sevilla

His performance was another reminder of his capabilities and it’s hard to imagine a more underrated player in the Premier League era than the Frenchman.

Giroud would have lumps kicked out of him during his days with Arsenal, bring others into play with his back to goal, set them up with knockdowns and lay-offs, and score goals of his own.

Everything you want from a centre-forward in a 4-2-3-1 formation, the system Arsene Wenger preferred.

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Even so, Giroud’s contribution often wasn’t enough for many Gooners, who’d lambast him for not getting on the scoresheet enough.

Yet his record of a goal every 2.41 games, including substitute appearances, for Arsenal compares favourably with one of the men brought in to replace him, Alex Lacazette, who has averaged a goal every 2.7 games since joining the club in the summer of 2017.

Alex Lacazette scored three in three at the start of the season but hasn't hit the net since

Out of respect to Giroud, Wenger offered him the chance to leave after paying £46million-odd for Lacazette, but he decided to stay and fight for his place at club level with the man he regularly kept out of the France team.

That changed the following January when Pierre-Emerick Aubameyang arrived, though, with Giroud reading the writing on the wall and accepting an offer from Chelsea.

Since moving to Stamford Bridge, Giroud has averaged a goal every 2.88 games and, while both Chelsea and Arsenal have won the FA Cup once in that time, his extra reward has been a Europa League winners’ medal as well.

Pierre-Emerick Aubameyang has scored four goals this season but has failed to hit the target in his last three games

Ironically, Arsenal were the beaten finalists in 2019 when Chelsea lifted the trophy, with Giroud, of course, the first goalscorer on the night.

Giroud has had to fight for much of his career — in fact, it’s one of the traits Wenger so admired in him.

Speaking at one of his Friday press conferences at Arsenal’s Hertfordshire HQ in 2015, he said: “What I also admire in Olivier is his mental strength.

“When a guy plays at 20 years old in Division Three in France and he gets up again and into the national team, there is some mental strength there, it is not easy.”

Giroud with Wenger during their Arsenal days

Giroud needed his mental strength, his belief in himself when he left Arsenal and he now finds himself in a similar position at Chelsea.

He and his agent have both been open about the fact they will look at options in January if he doesn’t get the game time he needs ahead of next summer’s Euros.

And Wednesday’s display, you’d imagine, will confirm once and for all where he stands because if he doesn’t start against Leeds on Saturday then there’s nothing else he can do.

The one thing that is certain is that, wherever he is from January, Giroud will score goals.

And it’s for that very reason that Frank Lampard and Chelsea shouldn’t make the same mistake Arsenal made in letting him go.