We work on keeping the ball deep in the court, everyday in practice. We work on extending any given rally, everyday in practice. Remember the pressure-less balls and our simple short court/cross court game. This is for consistency and extending a rally. The cones I set up when we are drilling are targets related to how deep in the court you need to hit the tennis ball. See the shaded area at on the second picture and make note of what 'depth' means. Though these two pages reference 'singles strategy,' being consistent and keeping the ball deep are part of the 'Doubles' game too.
Please read the jazz article by a great Trumpeter, and New Orleans favorite son, Wynton Marsalis. He penned this piece for a business medium, and noted the similarities a successful business has with a successful jazz group. I think the same can be likened to a sports team, and especially a tennis team. Where we're all on a team, but also compete and act as individuals and often pairs, within a team framework. This is one of my favorite articles, and I hope you enjoy it.
Enjoy the unique style and beats of one of my favorite jazz pianist, Thelonious Monk. He'll be performing 'Epistrophy' for the Saturday night jazz piece.
Thelonious Monk - 'Epistrophy'