Matthaus, a former German midfielder and current TV commentator, believes Diaz has shown his quality in the Premier League. He notes that Diaz is quick and powerful in duels, giving Bayern more options in attack. Diaz has played as a left winger, central midfielder, and second striker at Liverpool, and could potentially play behind Robert Lewandowski at Bayern, similar to Kingsley Coman or Serge Gnabry.

Matthaus acknowledges that Bayern must pay high salaries to compete at the highest level. He notes that Diaz will earn much more in Munich than he did at Liverpool.

However, Matthaus also draws a comparison with Nick Woltemade, a young striker from Stuttgart. While Diaz is 28, Woltemade is only 23. Matthaus questions why Bayern would pay €75 million for a player five years older than Woltemade, and suggests that Stuttgart might have been satisfied with the amount they paid for Diaz.