Change has come to San Mames. Four seasons under Ernesto Valverde are now history, and this weekend Edin Terzic takes charge of his first competitive match as Athletic Bilbao coach, a home opener against Sevilla. The 43-year-old German has had almost two months of work and eight friendlies behind him, five wins, two losses and a draw. As he himself would tell you, none of that counts now. The points start here.

Athletic open a round late, their first fixture having been pushed back because of the World Cup. Sevilla arrive a step ahead in match rhythm, having already scraped a late win over Rayo Vallecano at home in their debut. That gap in sharpness is a small but real edge for the visitors, and it is the kind of detail coaches at every level underrate. A team that has already played a competitive game moves and decides faster than one still shaking off preseason.

The night carries ceremony. Three local World Cup winners, goalkeeper Unai Simon, Aymeric Laporte and Nico Williams, will be honored before kickoff, though only Simon looks set to start. Williams, meanwhile, is closing on 200 appearances for the club. Terzic spoke about the winger being pain-free after the groin trouble that dogged him last season, back from the World Cup and, in the manager's telling, smiling again in training.

That last point is more than a soundbite. A player returning from a long injury who is finally training without pain and enjoying it is a different asset than one grinding through discomfort. Terzic flagged it deliberately, and any coach who has managed a player back from a stubborn injury knows why. The physical clearance is only half of it. The player believing in their own body is the other half.

Athletic are a club American coaches should study on principle. They compete at the top of Spanish football while fielding only Basque-developed players, which means their academy is not a nice-to-have, it is the entire model. A new manager inheriting that system does not get to shop his way out of problems. He has to develop and integrate, which is exactly the constraint most youth and small-club coaches actually live under.

For the reader with a team on Tuesday, Terzic's opening line is the useful one: eight friendlies and all that preseason work now count for very little once real points are on the table. It is a healthy reframe for the fall. Preseason builds fitness and gives you information, but it does not bank results. The habits you drilled in August only matter if they hold up in the first game that counts, and that is the standard to hold your players to.

Kickoff in the Spanish evening lands in the afternoon on the US East Coast and around midday on the West, a manageable window for coaches wanting to watch a new era begin. Athletic against Sevilla is a debut on one bench and a test of freshness on the other, and both storylines are the kind you can point your own players toward.