Expected Assists (xA) Per 90: Creative Output of Liverpool Players

Ever find yourself watching a Liverpool match and wondering why certain chances don't end up in the back of the net? Maybe you've noticed Trent Alexander-Arnold pinging a diagonal ball that somehow doesn't register as an assist, or you've seen Dominik Szoboszlai slip a through-ball that deserved better finishing. That's where Expected Assists (xA) comes into play, and for Liverpool fans who want to understand the creative engine behind the Reds, xA per 90 minutes is perhaps the most revealing metric available.

Expected Assists measures the quality of a pass based on how likely it is to result in a goal. Unlike traditional assists, which depend entirely on the finisher, xA credits the passer for the chance they created regardless of whether the shot went in. For a team like Liverpool, where creativity flows from multiple positions, tracking xA per 90 gives us a clearer picture of who's truly pulling the strings in the final third.

Why xA Per 90 Matters More Than Raw Assist Numbers

Raw assist totals can be misleading. A player who takes set pieces might rack up assists from corners that are more about the header than the delivery. Conversely, a midfielder who plays three perfect through-balls in a match might end a game with zero assists if the finishing isn't there. xA per 90 smooths out these fluctuations by measuring the quality of chances created per minute on the pitch.

For Liverpool's system, which relies heavily on full-back creativity and midfield progression, xA per 90 helps separate the players who consistently unlock defences from those who benefit from fortunate bounces. When you're looking at the stats-metrics page, understanding xA per 90 alongside other indicators like shot-creating actions gives you a more complete view of a player's creative contribution.

The beauty of xA per 90 is that it accounts for playing time. A substitute who plays 20 minutes and creates one good chance might have a high xA per 90, but it's not sustainable. Regular starters with high xA per 90 over significant minutes are the ones driving Liverpool's attack week in and week out.

Liverpool's Creative Hierarchy Based on xA Per 90

When we look at Liverpool's squad through the lens of xA per 90, a clear pattern emerges. Trent Alexander-Arnold has consistently posted elite numbers, often rivaling the best creative midfielders in Europe. His ability to deliver from deep positions, whether from open play or set pieces, makes him the Reds' primary chance creator. Even when he's playing as an inverted full-back or stepping into midfield, his passing range means he's always a threat to unlock a defence.

Mohamed Salah, despite being primarily a goalscorer, also registers high xA per 90 figures. His movement into half-spaces and ability to pick out runners with cut-backs makes him a dual threat. What's fascinating is how Salah's xA per 90 has evolved as he's taken on more playmaking responsibilities in recent seasons.

Among the midfielders, Dominik Szoboszlai arrived at Anfield with a reputation for chance creation, and his early xA per 90 numbers justified the excitement. His willingness to play vertical passes and his accuracy with through-balls make him a natural fit for Liverpool's transition-heavy style. Alexis Mac Allister, while more measured in his approach, also posts respectable xA per 90 figures, particularly from set-piece situations.

The Full-Back Factor in xA Per 90

Liverpool's system has always placed a premium on full-back creativity, and this shows clearly in xA per 90 data. Beyond Alexander-Arnold, Andy Robertson has historically been one of the most creative left-backs in the Premier League. His overlapping runs and precise crosses from wide areas generate consistent chances, even if his xA per 90 has dipped slightly as the system has evolved.

What's interesting is how the xA per 90 of Liverpool's full-backs compares to their traditional assist numbers. Robertson might have a season where he registers eight assists but an xA that suggests he deserved ten or eleven. That gap tells us something about the quality of finishing he's receiving, or lack thereof.

For a deeper look at how finishing affects these metrics, check out our piece on goals-per-shot-on-target-ratio, which explores the other side of the chance creation equation.

Set Pieces and xA Per 90

Set pieces are a significant factor in xA per 90 calculations, and Liverpool have been one of the Premier League's most dangerous teams from dead-ball situations. Alexander-Arnold's deliveries from corners and free-kicks consistently generate high xA values. The same applies to Mac Allister, who takes over corner duties when Alexander-Arnold is off the pitch.

The correlation between set-piece xA per 90 and actual assists from set pieces can vary wildly. A perfectly delivered corner that meets a defender's head might result in a goal, but if the defender heads it straight at the goalkeeper, the xA remains the same. This is why xA per 90 is particularly useful for evaluating set-piece takers: it credits them for the quality of delivery regardless of what happens next.

Our article on corner-kick-xg-value dives deeper into the specifics of set-piece expected goals, which complements the xA discussion nicely.

How xA Per 90 Varies by Position and Role

Not all creative responsibilities are created equal in Liverpool's system. A central midfielder like Curtis Jones might have a lower xA per 90 than a winger like Luis Díaz, but that doesn't mean Jones isn't contributing creatively. His role involves progressing the ball through midfield and finding the final pass to the assist-maker, which is harder to capture with xA alone.

Similarly, Darwin Núñez, despite being primarily a striker, has shown impressive xA per 90 figures when playing as a left-sided attacker. His ability to pull defenders out of position and slide passes across the box creates chances that might not show up in traditional assist stats.

The key takeaway is that xA per 90 should be contextualised within a player's role. A deep-lying playmaker will naturally have a different xA per 90 profile than an attacking midfielder who operates closer to the box. Liverpool's tactical flexibility means players often switch roles mid-match, making per-game averages more reliable than per-90 numbers from small sample sizes.

Limitations and Risks of Relying on xA Per 90

No metric is perfect, and xA per 90 has its limitations. First, it doesn't account for the quality of the chance after the pass. A square ball across the six-yard box might have high xA, but if the receiving player is off-balance or under pressure, the actual chance quality might be lower than the model suggests.

Second, xA per 90 can be inflated by set-piece responsibilities. A player who takes all corners and free-kicks will naturally have higher xA per 90 than one who doesn't, even if their open-play creativity is comparable. This is why it's important to separate set-piece xA from open-play xA when evaluating creative output.

Third, small sample sizes can be misleading. A player who creates two excellent chances in 45 minutes might have an xA per 90 of 0.8, but that number will regress toward their mean over a full season. Always look at xA per 90 over significant minutes—ideally 900 or more—before drawing conclusions.

Finally, xA per 90 doesn't measure pre-assist passes or hockey assists. A midfielder who plays the pass before the assist might be crucial to Liverpool's attack but won't see that reflected in their xA numbers. This is where combining xA per 90 with other metrics like progressive passes and passes into the penalty area gives a fuller picture.

Comparing Liverpool's Creative Output to Premier League Rivals

When you stack Liverpool's xA per 90 against other top Premier League sides, the Reds generally rank well in terms of total creative output. Alexander-Arnold's numbers often put him in the conversation with Kevin De Bruyne and Bruno Fernandes, though the playing styles differ significantly.

What sets Liverpool apart is the distribution of creative responsibility. While Manchester City might rely heavily on De Bruyne and Arsenal on Martin Ødegaard, Liverpool have multiple players capable of generating high xA per 90. This makes the attack less predictable and harder to shut down, but it also means no single player reaches the extreme xA per 90 heights of a system built around one creator.

The Bottom Line on xA Per 90

For Liverpool fans who want to understand the team's creative engine, xA per 90 is an indispensable tool. It reveals who's consistently making the right passes, who's creating chances that deserve better finishing, and who might be overperforming or underperforming their expected creative output.

Trent Alexander-Arnold remains the gold standard in Liverpool's squad, but the emergence of Szoboszlai and the continued excellence of Salah mean the Reds have multiple creative threats. The key is to use xA per 90 as part of a broader analytical toolkit, combining it with traditional stats, tactical observation, and context about each player's role.

As Liverpool continues to evolve under their current manager, tracking xA per 90 trends will help us spot changes in the system before they become obvious on the scoreboard. When a midfielder's xA per 90 starts climbing, it might signal a tactical shift. When a winger's numbers drop, it could indicate defensive adjustments from opponents. These are the stories that raw assist numbers alone can't tell.

So next time you're watching the Reds and wondering why a particular pass didn't become an assist, remember that xA per 90 has already given credit where it's due. And if you want to dig deeper into Liverpool's statistical landscape, the stats-metrics hub is your starting point for exploring the numbers behind the beautiful game.