I have a few questions regarding doubles players playing together on the mens', womens' and the mixed tournaments.
- How are the doubles tennis players partnered up? Is this totally based on players' decision?
- How do the doubles players qualify for tournaments, specially if they just begin playing together?
- Are there any requirements that the players need to respect in order to play together?
- Are the rules the same for the mixed and non mixed doubles players?
If different tournaments have different rules, then please at least list those of the grand slam's.