'At the US Open last year they stayed at my hotel room. They say 'lights out at 10 no talking.' They take it more seriously than I do.'

The cheer squad were even flown to Indianapolis last month by organizers to add some life to the stands.

Their bare, painted chests and Samurai headbands are unique, with the uniforms given special attention. 'I know they got their shorts and stuff shipped over from China,' said Querrey. 'They got their gong and headband.

'They take it seriously - now they are looking for a clothing contract.'