![Jamie Murray: 10 things you didn't know about doubles tennis (including what whose hand signals really mean) Jamie Murray: 10 things you didn't know about doubles tennis (including what whose hand signals really mean)](https://www.telegraph.co.uk/content/dam/men/2017/07/07/TELEMMGLPICT000133996392_trans_NvBQzQNjv4Bq8JWdQZ1J_PyHeSO_SJ-VAuQ7InuxQIQ-797__fFjSOg.jpeg)
Jamie Murray: 10 things you didn't know about doubles tennis (including what whose hand signals really mean)
Why do volleyball teams use hand signals and what are the most common hand signals they use? - Quora
![Nishikori signals the 'bird' strategy in his doubles match @ London Olympics 2012. Do you need any more proof for scratching the event - anywhere? Or are we not done experimenting if Nishikori signals the 'bird' strategy in his doubles match @ London Olympics 2012. Do you need any more proof for scratching the event - anywhere? Or are we not done experimenting if](https://media.tumblr.com/tumblr_m7zimj43X31qlew1u.bmp)
Nishikori signals the 'bird' strategy in his doubles match @ London Olympics 2012. Do you need any more proof for scratching the event - anywhere? Or are we not done experimenting if
![Jamie Murray: 10 things you didn't know about doubles tennis (including what whose hand signals really mean) Jamie Murray: 10 things you didn't know about doubles tennis (including what whose hand signals really mean)](https://www.telegraph.co.uk/content/dam/men/2017/07/07/TELEMMGLPICT000133997301_trans_NvBQzQNjv4BqLeUJvOJqnV613e1NxllMSYIixnj0N-lTmS4HQcSqwKA.jpeg)