Emma Raducanu withdrew from her first round match at the Wuhan Open after a dead medical time in the second set.
The world n ° 30 followed 6-4, 6-1 in Ann Li in the United States when it made the decision to retire.
She needed to have her blood pressure, temperature and other checks carried out after being dizzy throughout the second set, with a double fault putting in a dominant advance.
The recent resumption of Raducanu in shape saw it reach the third round in Wimbledon and the US Open, but since then it has come out of Open Korea and the China Open at the last 16 and 32 stages.
