Emma Raducanu has withdrawn from the Miami Open as she continues to battle the virus that has plagued her since the beginning of February.
The British No 1 reached the second round in Indian Wells last week but will miss the second leg of the so-called Sunshine Double.
Raducanu’s best result of the season came in reaching the final in Cluj-Napoca, Romania, on February 7, but she looked completely washed out in defeat by Sorana Cirstea and it later emerged she had picked up a virus.
She struggled with the illness in first-round defeats in both Doha and Dubai and Daily Mail Sport understands she is still trying to shake it off.
With pre-season disrupted by a foot injury and the decision to split from coach Francis Roig after the Australian Open, it has been a stop-start season for a player whose career is crying out for consistency.
Raducanu had appeared to start more brightly at Indian Wells last week as she began her first campaign with former coach Mark Petchey back in the fold.
Emma Raducanu has struggled to overcome a virus which has troubled her since last month
With Petchey the short-term hire at her side alongside ex-professional Alexis Canter – who has been in her camp since her promising run in Transylvania – the 23-year-old thrashed Anastasia Zakharova 6-1, 6-3 in the first round.
But under an hour into her second-round clash, Raducanu was turned over by Wimbledon and US Open finalist Amanda Anisimova, claiming just two games.