Real Madrid and Manchester United have been long rivals on the world stage, with both teams having strong claims to be one of the best clubs in Europe. However, Real Sociedad and Valencia CF have always had their own story to tell as they have been playing in different leagues but have always been able to compete against each other.

In the Premier League, Real Sociedad has struggled to find its feet after a disappointing season last year, while Valencia CF has consistently performed well in the league and has won several trophies. However, there is still a chance that both teams can compete for a spot at the 2026 World Cup, especially if they perform well in the Europa League this season.

Real Sociedad, however, has a stronger history in European competitions than Valencia CF. The club has won the UEFA Europa League three times in a row (2018, 2020, and 2022) and also finished runners-up in the competition four times (2017, 2019, 2021, and 2022). This record suggests that Real Sociedad has a lot of talent and experience that could make them a formidable opponent in the competition.

On the other hand, Valencia CF has also had success in European competitions, winning the UEFA Europa League in 2015 and 2018. They have also reached the final of the competition twice, most recently in 2018. While they may not have the same level of experience or talent as Real Sociedad, they have also had some success in the past.

In conclusion, both Real Sociedad and Valencia CF have a history of competing in European competitions, and it's likely that they will both be able to compete for a spot at the 2026 World Cup. However, only time will tell which team will emerge victorious in the competition.