I cast the chart when I read your question: 06 Oct 2021 TZ = -2.0 6.53h AM ASC=14Li18
So, question is "who will win?"
In his book "Sports Astrology" Frawley suggest:"In this type of question look for the planet that fisrt aspect lord 10, or, failing that, has immediate conjunction with the MC. That planet associate on nickname of team. "
So, in this chart lord of 10th house is Moon and its first aspect is with Sun. Sun is in connection with red color. Spain and Belgium have red kit. Nickname for Spain is "Red One" and for Belgium "Red Devils". AS Sun is not in mutable sign I expect "Red One"/Spain will win.