Arsenal's right back position has been under constant change within this campaign.
The space has been filled with Hector Bellerin for the most part of the season, yet his inconsistency has led to Cedric Soares filling in when needed to.
However, an unfamiliar face appeared in that defensive spot against West Ham at the weekend.
Although he had only appeared once before in the league this season, Calum Chambers performed fantastically against the Hammers.
The Englishman played a key role in Arsenal's terrific comeback, being a major aspect for two of the Gunners' goals.
A pin-point cross to the feet of Alexandre Lacazette allowed the Frenchman to pull one back for Mikel Arteta's side, before forcing Craig Dawson to concede an own goal.
As well as goal contributions, although Arsenal did concede three, Chambers had the most clearances (6) in the whole game, displaying defensive excellence.
An all round brilliant performance from the defender, ending the day with the captain's armband and Man of the Match.
But has he earned a spot in Arteta's squad?
A career riddled with injuries
For Chambers, it has been a bumpy road up to this point which makes his performance on Sunday even more inspiring.
The Englishman had incurred a Cruciate Ligament Rupture last season and had to sit out for 340 days, missing crucial game time after returning from Fulham.
But after his return against Rapid Vienna in the Europa League, the defender has been nothing but impressive.
After a long stint out, Chambers sent a very clear message to boss Arteta as we approach the Summer window.
His darting runs, crossing ability, as well as his ever growing confidence is a breath of fresh air for Arsenal fans.
Even at half time the defender was compared to the great Cafu by Jamie Carragher due to his movement down the right flank.
Arteta stated that Chambers has been working tremendously to get back and challenge for his space:
"He was really good. He’s been training really well. He gives us something else, some height in the backline. He was really efficient in the final third as well. He had a great performance.”
As mentioned by the Arsenal boss, his height and build works well when it comes to setting up chances and getting forward. And since the arrival of Martin Odegaard, it is something fans have been craving for.
Link up play between the two emerging talents worked well on Sunday, bringing a new swagger to Arsenal's play. Only if the Gunners had capitalised on this early on.
As Arsenal approach the end of a disappointing season and the start of a crucial Summer window, Chambers may have offered an alternative to replace the uncertain Bellerin.
What's next for Chambers?
This is another great opportunity for Chambers to capitalise off recent poor performances from Bellerin and provide when needed to.
Liverpool have been on a poor run of form, sitting four points above Arsenal in seventh. If the Petersfield Cafu turns up again in two weeks time, Bellerin and Soares will have a run for their money.