What's in Novak Djokovic's drinks bottle? + BJK Cup review, Cam Norrie's hot water in Saudi and your questions

Tennis coach Calvin Betton, writer George Bellshaw and senior sports journalist at i and inews.co.uk James Gray discuss all the biggest issues in tennis over the last week, including:

• Why Novak Djokovic's drinks bottle became such a big deal
• How the BJK Cup was almost a disaster, then wasn't, then was again [and later why it should only be every four years]
• What Cam Norrie should have done instead of going to Saudi Arabia for pre-season - and why it's different from allowing politics to ban Russian players from playing at Wimbledon
• The secret to a top doubles pairing

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