Raducanu entered the last 16 of the Miami Open after her round-of-32 opponent McCartney Kessler was forced to retire in the second set through injury.

Petchey, a well-known tennis commentator and former coach of Andy Murray, has been seen in Raducanu’s corner alongside Jane O’Donoghue

Emma Raducanu has powered to the quarter-finals of the Miami Open and is playing some of the best tennis of her career, despite parting ways from her coach before the tournament