web & database relationship infrastructure

One of my new clients needs his collection of sport website redesigned/-developped.

The collection consists of the following:

• 1 country website
• 2 region websites
• 1 for each province (around 5 or 6)

My problem is the following: Each website has it's own features/data like news posts, tournaments, region rankings... but there are also common data between them, for example players, clubs, global rankings.

My question is the following: How sghould I structure my database?

• One database for each website? and copy commonly data with each query?
• One database for all. and use some type/region field.

Thanks

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