AZ Alkmaar's Perfect Start Faces Its First Real Test at Heerenveen's Fortress
SportSignals Match Desk · Football analysis desk ·
There is a version of this preview that writes itself. League leaders travel to a mid-table side, win comfortably, everyone moves on. The interesting thing is that the data does not quite support that narrative, which means this fixture deserves considerably more careful thought than it will probably receive in most previews.
AZ Alkmaar: The Numbers Behind the Perfect Start
Their away form over the last ten Eredivisie matches provides further context. In five away matches in that window they have won one, drawn two, and lost two, scoring six and conceding seven. The xG numbers for that away sample are more sobering: 1.73 expected goals for per game against 2.5 against, which means they have been conceding chances of significantly higher quality than they have been creating when away from home. They also average 16 shots per game away from home with seven on target, and carry 53 percent possession, so the structure is there. The efficiency has not always been. That is a tension worth holding onto as we assess whether the early-season form is a step forward or partly a product of favourable fixtures.
Heerenveen: Fortress at Home, Fragile Everywhere Else
SC Heerenveen present one of the more striking home and away splits in the current Eredivisie data. At home in their last five matches they have won four and drawn one, scoring ten and conceding just two. That is a clean sheet rate of 60 percent and a goals-against figure that puts them among the tightest home defences in the division over that stretch. They have not lost at home in that entire run.
Away from home, the picture collapses entirely. In their last five away matches they have won one, drawn one, and lost three, conceding ten goals in the process. The clean sheet rate drops to 20 percent. This is not a team that travels well, which means Heerenveen will be acutely aware of how much the home fixture matters to their season.
However, there is a significant structural problem for Heerenveen going into this match. Their injury list is extensive. They currently have seven players confirmed out, which is a heavy burden for any Eredivisie club. Among those are four players with moderate severity injuries, one long-term absentee who has been out since April, another who has been absent since November 2024, and a further long-term case. That level of disruption to squad depth will affect the shape and structure of whatever XI the manager puts out, and it creates real uncertainty about whether their home form is sustainable or whether it has been achieved against less demanding opposition before the injuries accumulated fully.
Their current season xG figures from the standings table underline this worry. Heerenveen show 1.9 xG for across two matches against 4.0 xG against, which is a deeply unflattering underlying picture and suggests that their points tally of four from two games owes something to finishing above expectation and the opponents not converting when they should have. The goals for column in the standings says three scored, which is a reasonable tally, but creating only 1.9 expected goals in two matches is not a platform you can build a top-half season on.
The Injury Factor and What It Means on the Pitch
Both clubs carry injury problems into this fixture. AZ have three players currently sidelined, including one long-term absentee who has been out since March. Their two additional injuries have moderate and minor severity, so the core of the squad should be broadly available. Heerenveen, by contrast, are managing seven absences simultaneously, four of which are moderate severity and started in the summer pre-season window. That timing matters because it means those players have not been part of whatever early-season build-up work has underpinned the home results. The team that has been winning at home may already be operating without several players who would ordinarily be in the first-choice structure.
The interesting thing about injury lists is that they tell you about depth as much as individual quality. If Heerenveen have been winning comfortably at home despite this many players out, that could mean the replacements have stepped up well. Or it could mean the home fixtures so far have been against weaker opponents and AZ will expose the thinness of the squad in a way that those opponents did not. The sample size is too small to be certain, but the xG figures lean toward the latter interpretation.
What the Data Suggests About the Match
There are two clear stories running through this data. AZ look like a genuinely strong side at the start of this season, with an underlying xG profile that supports the results rather than undermining them. Their away form from the broader ten-match window is a relevant caution, because they have not consistently dominated on the road, and Heerenveen's home record is not to be dismissed lightly.
Against that, Heerenveen's own underlying numbers from the current season are concerning. An xG against of 4.0 in two matches, combined with seven players unavailable, means the defensive structure is under strain in ways the results have not yet fully reflected. AZ will look to build through the lines in transition, and if Heerenveen's depleted squad cannot set an effective pressing trigger to win the ball high, they may find AZ's progressive build-up play very difficult to handle.
The home form is real and should not be dismissed. But the combination of a heavy injury list, a weak underlying xG profile, and an opponent with genuine quality across their attacking output makes this a match where AZ's ability to control the shape and dictate the tempo will likely be the deciding factor.