USA picks clay. Tactical choice, is this the first time they've ever chosen clay for a home game? Much like back in 2003, Australia played GB and chose clay. Andy Murray is the only Brit that plays a lot of clay court tennis.
In general, Murray's game is suited for clay, but I feel like Murray’s shots don't quite have the weight needed on clay. He just needs to find his game again cause now he’s losing against players that neither are in the first places.