I have two questions about Davis Cup. The first thing that is bothering me the most is the selection of a doubles partner. I am in a doubles team with a player from my country and we are the best two ranked players in the country. However, for Davis Cup, I always get some lower ranked player that I'm not used to play with. Why does it happen and is there a way to fix it and play with my normal partner?
The second question is about surface. How is surface chosen and can I choose it myself sometimes?

Sorry if these questions were aleready asked, I haven't been on this forum for a long, long while.