The hidden hierarchy of tennis practice courts: I was back in the park, smelling the weed

The unwritten rule in professional tournaments? Do not hog the practice court. But as leading players testify - the reality is very differentOn a cool Wednesday afternoon before the USOpen last year, Daniil Medvedev and Alexander Zverev were busy fine-tuning their games in an intense practice set at Louis Armstrong Stadium. Danielle Collins and Christian Harrison, semi-finalists in the mixed doubles tournament, were scheduled to take their place at the hour and the American pair duly arrived a c...