I recently observed an awkward warmup for a USTA doubles match. The players began hitting ground strokes - nothing unusual. After about 5 minutes, the visiting team started trading glances with each other, as in "what the heck?" They seemed to be waiting for the home team to take the net first to warm up volleys, but the home ladies were not budging from the baseline. The visitors finally came to the net for volleys, but they seemed a bit annoyed. I'm always chomping at the bit to warm up at net, so will approach with my partner after spending minimal time hitting groundstrokes. Are there unwritten rules regarding who takes the net first during warmup? Is it supposed to be the home team?