Martina Navratilova has delivered a pointed assessment of Emma Raducanu's approach to coaching, labelling the British player's frequent changes in her backroom team as the "biggest mistake" of her career thus far. The 18-time Grand Slam singles champion expressed her concerns about the world No 23's reluctance to maintain long-term coaching relationships. Speaking to Sky Sports, Navratilova stressed that consistency was essential for Raducanu's development. "You need somebody full-time," the tennis legend stated. TRENDING Stories Videos Your Say She argued that players must commit to their coaches and allow sufficient time for working relationships to bear fruit, rather than expecting immediate results from new partnerships. Since her breakthrough on the professional circuit in 2021, Raducanu has cycled through a succession of coaches at a remarkable rate. The former US Open champion parted ways with Francisco Roig in January, ending a collaboration with Rafael Nadal's former coach that had begun only the previous summer. Before Roig, the British player had worked with Nigel Sears, Andrew Richardson, Torben Beltz, and Nick Cavaday, among others. Following her latest split, Raducanu initially trained with Alexis Canter on an interim basis before teaming up with long-standing associate Mark Petchey for Indian Wells. Prior to her Miami withdrawal, the 23-year-old indicated she was hesitant to appoint a single permanent coach for an extended period. LATEST SPORTS NEWS: British former footballer arrested in Spain following drugs raid Aryna Sabalenka threatens to boycott tennis tournament after 'ridiculous' comment made Micah Richards makes heartbreaking admission on live TV during Champions League coverage Navratilova elaborated on her concerns, suggesting that even a part-time arrangement could work provided there was continuity. "But you still have to stay consistent and get this person to get to know you, get the history and give them a chance to make a difference. You can't expect results to come right away that's a long process," she explained. The Czech-American legend emphasised the importance of player commitment to their coach. "You need to buy into the coach and stay there for a little bit longer," Navratilova added. She warned that working with numerous coaches creates confusion: "I think that's the biggest mistake she's been through too many people, and then you get so many different ideas, and you don't quite know which one to stick with." Raducanu's recent form has been hampered by health issues that first disrupted her Middle East swing last month. The illness forced her withdrawal from the Miami Open on Monday, denying her the chance to build on last year's quarter-final run at the WTA 1000 tournament. Her Indian Wells campaign had already ended disappointingly, with Amanda Anisimova dispatching the Briton in just 52 minutes during their encounter a fortnight ago. The 2021 US Open champion now plans to resume competitive action at the Linz WTA 500 event in early April. The Austrian tournament will mark the beginning of Raducanu's clay-court season as she looks to regain momentum following her recent setbacks. Our Standards: The GB News Editorial Charter