Raducanu’s disappointment was compounded when she was broken again in the first game of the second set and after failing to convert any of the three break points she earned in the sixth game, it was Muchova who edged across the line 6-4.
However, she broke back in the fifth courtesy of a stunning backhand return down the line before holding serve for the first time, and she was right back in it when she broke for a second time in the ninth game to trail only 5-4.
The 22-year-old fought back from a dreadful start to take the first set to a tie-break, but ultimately went down 7-6 (6) 6-4 to miss out on a last-16 clash with American McCartney Kessler, who had earlier dumped world number three Coco Gauff out of the tournament.
Raducanu, who appeared to be in tears as she went to the umpire’s chair after the second game, suffered a nightmare opening to a rain-delayed encounter, losing both of her service games as she fell 4-0 behind.
Great Britain’s Emma Raducanu was knocked out of the the Dubai Duty Free Tennis Championships by 14th seed Karolina Muchova in a hard-fought second-round showdown.
