A theft in Mo Farah’s hotel room has led to a rather public spat between him and another former long-distance runner, Haile Gebrselassie. Farah claimed to have had cash, a watch, and two mobile phones snatched from the room in Ethiopia, where the London 2012 star had been training. Gebrselassie owned the hotel, and after Farah spoke out against the 46-year-old, the four-time Olympic gold medallist was accused of blackmail by his contemporary.  In honour of this latest spat between sports stars, we’ve taken a look at some other memorable sporting feuds.