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Switzerland's Roger Federer, 2nd from right, and his coaches Severin Luethi, Ivan Ljubicic and Pierre Paganini, from right, unpack their bags prior to a training session at the All England Lawn Tennis Championships in Wimbledon, London, Wednesday, June 28, 2017. The Wimbledon Tennis Championships 2017 will be held in London from 3 July to 15 July. (KEYSTONE/Peter Klaunzer)