Group C's opening fixtures delivered exactly what World Cup football promises: drama, intrigue and a significant reshaping of expectations.

Scotland's long-awaited return to the global stage ended with a priceless 1-0 victory over Haiti, while Morocco underlined their credentials as genuine contenders by holding Brazil to an impressive 1-1 draw. By the end of matchday one, it was Scotland sitting on top of the group, Morocco carrying momentum, Brazil searching for answers and Haiti wondering what might have been.

With just one round of fixtures completed, Group C already feels far more competitive than many predicted.

This article looks at the biggest lesson learned from each nation following the opening games and what those performances could mean for the race to reach the knockout rounds.

If there was one team that enhanced its reputation more than any other in Group C, it was Morocco.

The Atlas Lions arrived in the United States carrying the legacy of their historic 2022 World Cup semi-final run, but there were still questions over whether they could reproduce those levels against elite opposition. Their performance against Brazil provided a convincing answer.

For long stretches in New Jersey, Morocco looked the better side. They pressed aggressively, moved the ball with confidence and repeatedly exposed weaknesses in Brazil's structure. Brahim Diaz controlled attacking transitions superbly, while Ismael Saibari's outstanding finish rewarded a first half that Morocco largely dominated.

Perhaps most encouraging was the composure shown by 18-year-old Ayyoub Bouaddi. Against experienced midfielders such as Casemiro and Bruno Guimaraes, he played with a maturity beyond his years and looked entirely comfortable on the biggest stage.

The only criticism Mohamed Ouahbi may have is that his side failed to fully capitalise on their superiority. After registering 12 shots in the first half, Morocco became noticeably more cautious after the break and allowed Brazil to settle.

Nevertheless, everything that made Morocco dangerous in Qatar was again on display: organisation, technical quality, discipline and belief. On this evidence, they are capable of qualifying from the group and causing problems for anyone in the knockout rounds.

Brazil escaped their opening fixture with a point, but the performance raised more questions than answers.

Carlo Ancelotti's side entered the tournament among the favourites, yet they looked surprisingly vulnerable in the first half against Morocco. Their midfield struggled to establish control, they surrendered possession far too easily, and their defensive organisation repeatedly allowed Morocco to exploit dangerous areas between the lines.

Without Vinicius Junior, the outcome could have been very different.

The Real Madrid winger produced a magnificent equaliser to rescue Brazil after Ismael Saibari had deservedly put Morocco ahead. It was a reminder of the extraordinary talent available to Ancelotti, but it also highlighted how dependent Brazil had become on moments of individual brilliance.

The second-half introduction of Fabinho brought greater balance and control, while Danilo helped stabilise the defensive shape. Those adjustments improved Brazil considerably, yet the overall display lacked the authority expected from a side chasing a sixth World Cup title.

The lesson is simple. Brazil still possess immense quality, but they must become far more cohesive. Better ball retention, stronger defensive organisation and greater support around Vinicius and Raphinha will be essential if they are to fulfil their potential in this tournament.

For Scotland, style mattered far less than substance.

After 28 years away from the World Cup, Steve Clarke's side simply needed a victory, and they found one through John McGinn's historic first-half strike against Haiti.

The Aston Villa midfielder became Scotland's first World Cup goalscorer since Craig Burley in 1998, and his goal ultimately secured the country's first World Cup win since 1990.

Ben Gannon-Doak was one of the standout players in the opening round. The youngster repeatedly troubled Haiti's defence with his direct running and creativity, providing the spark behind Scotland's most dangerous moments.

However, the performance also exposed areas for improvement. Scotland struggled to maintain control after taking the lead and spent long periods defending against a Haitian side ranked significantly below them.

The midfield occasionally lost its grip on proceedings, while the attack failed to convert promising situations into a second goal that would have settled nerves.

Still, tournament football is often about finding ways to win rather than producing perfect performances. Scotland showed resilience, organisation and character under pressure. Those qualities have already placed them at the top of the group.

Now comes the bigger challenge: proving they can reproduce those qualities against stronger opposition.

Despite sitting bottom of the group, Haiti arguably left matchday one with more encouragement than disappointment.

After a nervous opening period, they grew into the contest impressively and caused Scotland genuine problems. Jean-Ricner Bellegarde dictated play effectively in midfield, while Ruben Providence and Louicius Deedson consistently threatened in transition.

There were moments when Haiti looked the more comfortable side in possession of the ball. Their downfall was not due to lack of effort, organisation or technical quality. It was the final action.

Time and again, promising attacks broke down because of an overhit pass, a misplaced cross or an inability to provide the decisive touch in the penalty area. Frantzdy Pierrot's late, missed header perfectly summed up the evening.

Defensively, Haiti remained competitive throughout and rarely looked overwhelmed by the occasion.

While they remain pointless after one game, their performance suggested they are fully capable of influencing the outcome of Group C. Any opponent that underestimates them risks making a costly mistake.

Perhaps the biggest takeaway from matchday one is that Group C remains entirely unpredictable.

Scotland sit top with three points and hold the early advantage. Morocco have reinforced their credentials with an outstanding display against Brazil.

Brazil remain dangerous due to their depth and individual quality, even if their collective performance was lacking. Haiti have shown enough to suggest they are capable of taking points from someone.

Before the tournament, many expected Brazil to establish immediate control of the group. Instead, Morocco matched them, Scotland seized top spot, and the qualification picture became far more complicated.

The margins are already incredibly fine.

One thing appears increasingly certain: Group C will not be settled early. The battle for qualification looks set to run all the way to the final round of fixtures, and every point may prove decisive.