A run that will not end

Real Sociedad head into the new season carrying a problem they could not solve in the last one. The Basque club have now gone 15 matches without a clean sheet, a streak that bleeds from last season into a preseason where they conceded in all six friendlies. In five of those six they gave up two goals. The head coach, Martin Matarazzo, has not yet found the fix, and a summer of tune-up games did not provide it.

Clean sheets are not everything, but a run this long is not noise. It is a pattern, and patterns in defending usually point to something structural rather than a run of bad luck or one shaky goalkeeper. When a team concedes across an entire preseason, in different games against different opponents, the issue is almost always in how the group defends as a unit, not in one individual.

Why preseason results are still a signal here

Coaches are right to wave away preseason scorelines most of the time. Friendlies are for fitness, for trying combinations, for giving minutes. Winning them means little. But a defensive trend across a whole preseason is different from a single odd result. If a team cannot keep the ball out in any of six controlled, low-stakes matches, the competitive fixtures are unlikely to be tighter, because the pressure only goes up.

That is the uncomfortable read for Real Sociedad. The friendlies were the easy part, and they still conceded every time. The habits that produce clean sheets, the shape, the communication, the willingness to defend as a block, apparently have not clicked yet. Matarazzo now has to install them under the lights of real competition, which is a much harder place to teach.

Defending is a team behavior, not a back four's job

The deepest lesson for a US coach is that clean sheets are built from the front. A team that does not press together, does not track runners from midfield, and does not close space as a unit will expose whatever back line it has, no matter how talented the defenders are. Fifteen games without a shutout is rarely the fault of four players. It is usually eleven players who are not defending in sync.

For your own team, that reframes how you coach the defensive side of the ball. Do not treat defending as something you drill only with your center backs. Drill it as a collective: when the ball is lost, who presses, who covers, who drops, and how the whole shape shifts together. The teams that keep clean sheets are the ones where the striker defends and the winger tracks back, not just the ones with a good goalkeeper.

A session you can run tomorrow

Build a session around defensive transition. Play a small-sided game where the moment a team loses the ball, they have five seconds to win it back or force it backward before dropping into shape. Reward the group, not the individual, for a possession where the opponent never gets a clean look at goal. That teaches the pack behavior Real Sociedad are missing.

And keep a simple stat: how many possessions in a row can your team defend without conceding a clear chance. If that number will not climb across a few weeks, you have Real Sociedad's problem in miniature, and the fix is the same, which is to make defending a habit the entire team owns rather than a task you leave to the back line.