Barely four years ago, Karl Etta Eyong was playing on the sloping, dried-up pitches of Douala, Cameroon, desperate to make an impression.

Fast forward to today, and only Real Madrid’s Kylian Mbappe, Barcelona’s Robert Lewandowski and Atletico Madrid’s Julian Alvarez have scored more than the Levante striker’s six La Liga goals this season.

Yet in a sense, not much has changed.

Etta Eyong still plays football like the bustling, fired-up forward who blasted his way through the ranks at the Ecole de Football Galactique (Galactics’ Football School) back in his central African homeland, tussling and scrapping for every loose ball. But, while the now 22-year-old continues to attract attention on the pitch, intrigue is beginning to build around his future.

His short professional career has already thrown up unlikely twists and turns.

Originally a midfielder, he was spotted in Cameroon by scouts for Cadiz’s academy. After a couple of years there, he secured a move to Villarreal last summer, where he scored 19 league goals in 30 games for their ‘B’ team as an all-action No 9.

He made his first-team debut in April, scored a dramatic late winner at Girona in his second senior appearance a couple of weeks later, and looked to be the natural choice to succeed the Everton-bound Thierno Barry as the club’s No 1, as he hit another goal and provided two assists in Villarreal’s opening three games of the current season.

But then, despite that exciting start, news emerged on deadline day in September that Villarreal had agreed a permanent transfer — a move not only to their local rivals in eastern Spain, Levante, a side newly promoted to La Liga, but for a fee of just €3million (£2.6m/$3.5m at the current exchange rates).

Now, after scoring five times in his opening nine league matches for his new club, Spain’s big two are taking notice.

According to sources close to the player’s camp, who, like all those cited in this article, asked to remain anonymous to protect relationships, both Barcelona and Real Madrid have been following him. However, when the winter transfer window opens in January, the two-cap Cameroon international will likely be in Morocco, playing for his country in the Africa Cup of Nations.

So, just what is it about this young striker that has caused such a frenzy? The Athletic dug into the tape to try to find out.

Etta Eyong has averaged a goal every 146 minutes since his La Liga debut for Villarreal, and has only failed to score or assist (or do both) in four of 12 top-flight games this campaign. He clearly knows how to put the ball in the net.

His efficiency in front of goal is not built on flawless ball-striking or unsustainable form. Etta Eyong often hits through the ball cleanly, but is prone to the occasional miscued and overpowered shot, and his finishing is slightly inconsistent when he has time to pick his spot.

On the positive side, it is an imposing physical profile, his sense of anticipation, and an innate determination that make him so dangerous. He is a player who will attack everything in the penalty area, but is equally capable of quietly floating into space with intelligent movement and timing away from the ball.

Of his six La Liga goals this season, three have been bundled home from inside the six-yard box after he reacted quickest to deflections and close-range saves. He was lurking on the shoulder of Mallorca centre-back Antonio Raillo before he pounced with a left-footed finish in a 1-1 draw with visitors Levante on October 26. In a 2-0 win at Real Oviedo three weeks earlier, he was the only player on his toes when a speculative shot from Oriol Rey looped back into the fray.

Here he is at home against Real Madrid in late September, flinging himself at a deflected cross and stretching every sinew to nod home past Thibaut Courtois for Levante’s reply in an eventual 4-1 defeat — an example of the competitiveness and physicality he brings when close to goal.

More than 80 per cent of Etta Eyong’s goal attempts have come from inside the penalty area this season, with the shot map below serving to highlight his ability at sniffing out chances within the width of the posts.

Though we are still early in the campaign, a high expected goals (xG) per shot value of 0.2, along with a decent spread of right-footed, left-footed and headed efforts, points to a striker who can barge his way into valuable shooting positions and adjust to whatever falls his way once he gets there.

More than his finishing, Etta Eyong’s varied profile will appeal to the biggest clubs.

He can play the bustling, back-to-goal target-man role, happy to use his upper-body strength to shield the ball, while still being generally neat and tidy with one-touch passes into onrushing midfielders to keep his team moving up the pitch.

Though he is not the tallest (181cm/5ft 11in), he can hold his own in aerial duels and often uses movement to create space in the box.

That first senior Villarreal goal at Girona in May came after he ghosted towards the penalty spot between the two centre-backs, while this season’s one for Levante away to the same opponents showed him lingering behind defender Daley Blind in the build-up to the eventual cross, before slipping into a blind spot and rising highest to direct an impressive header into the far corner.

Etta Eyong is also a threat on the transition, able to click into top gear quickly and stretch defences with darting runs in-behind. While he has turned into more of a poacher at senior level, he often looked like a one-man battering ram for the ‘B’ teams at Cadiz and Villarreal, prepared to run the channels and duel with defenders for every ball played forward for him to chase.

According to SkillCorner, he is the striker to have logged the most explosive accelerations per game in La Liga this season, reaching speeds of at least 20km/h from standing or walking starts. He also ranks fourth for the number of sprints per game. Both these metrics help to highlight his turn of pace, as well as the repeatable bursts of power that often help him to nip in and steal a bouncing ball in the box.

Here is an example of what Etta Eyong can provide on the break, quickly identifying the space in behind and streaking clear of back-tracking defenders. The finish lacks control, a glimpse of the inconsistency mentioned above, but the raw materials — lightning pace, a robust build, and minimal backlift to generate power in his shots — are there to refine.

Last but not least, Etta Eyong is a hard worker from the front.

You get the feeling he enjoyed the swirling conditions in Mallorca last month, tearing across the attacking third and not shying away from the odd shoulder-barge and crunching tackle to help keep the visitors’ defensive shape.

Below, for example, after team-mate Manu Sanchez is denied from close range at the back post, watch Etta Eyong’s reaction to track back with the home side’s Mateo Joseph and see the ball out of play.

Away from such lung-busting recovery runs, Etta Eyong knows how to make a nuisance of himself and stick to opposition players. He is an effective front-line defender when it comes to harrying teams up the pitch.

Here, later in the same game, after a bobbling pass intended for him is intercepted by Pablo Torre, Etta Eyong is all over the Mallorca midfielder, staying on the right side of the law as he bundles him to the ground and regains possession for his team.

There are still areas to work on for a young and inexperienced player (he turned 22 in early October and has made 11 La Liga starts), who can be a touch over-excitable and rash with his decision-making at times. But, given some of the goalscorers who have left La Liga at similar stages of their development in recent seasons — Bayern Munich’s Chelsea loanee Nicolas Jackson, Barry to Everton, Samu Aghehowa from Atletico Madrid to Porto — another fast-tracked move in his case is not totally out of the question.

Whether that happens or not, you will certainly be hearing Etta Eyong’s name more in the coming years.