Elena Rybakina said her reunion with controversial coach Stefano Vukov has boosted her US Open campaign after she demolished Britain's Emma Raducanu to reach the fourth round on Friday.
Controversial coach boosting Rybakina at US Open

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Elena Rybakina said her reunion with controversial coach Stefano Vukov has boosted her US Open campaign after she demolished Britain's Emma Raducanu to reach the fourth round on Friday.