The pair won the FA Cup together at Arsenal in 2014.
The Scots began their campaign with a 3-0 victory over Cyprus on Saturday, but they face a far more formidable task on Tuesday when they welcome Group A's top seeds to Hampden. Spain started with a 3-0 win at home to Norway, but striker Dykes is adamant his team have built a sense of "togetherness" that should allow them to go into the match with no fear.
FIFA is planning for a 32-team tournament to be played every four years from 2025.