'It was very sudden' - why Gauff hired Sabalenka's old serve guru Coco Gauff turns to a biomechanics expert, who helped rival Aryna Sabalenka overcome her serving troubles, on the eve of the US Open. Original Source: https://www.bbc.com/sport/tennis/articles/cgr9llq9rdno?xtor=AL-72-%5Bpartner%5D-%5Byahoo.north.america%5D-%5Bheadline%5D-%5Bsport%5D-%5Bbizdev%5D-%5Bisapi%5D Previous article: 'They couldn't get a dog sitter' - Jones calls home after reaching US Open Prev Next article: Emma Raducanu wants more mixed doubles after ‘a lot of fun’ with Carlos Alcaraz Next