by 
The Great Britain Emma Raducanu was picked up in a highly competitive showdown from the Dubai Duty Free Tennis Championship by Karolina Muchova from the 14th Seed seed.
The 22-year-old defended himself from a terrible start to take the first set into a tie breaker, but finally went 7: 6 (6) 6: 4 to miss a last 16 clash with American McCartney Kessler. who had unloaded World No. Three Coco Gauff from the tournament.
Raducanu, who seemed to be in tears after the second game to be a referee chair, suffered a nightmare opening to a back delayed encounter and lost both service games when she fell back 4: 0.
However, she broke back in the fifth with the friendly approval of a breathtaking back hand before she held the serve for the first time, and she was right again when she broke in the ninth game for the second time to kick just 5: 4.
The Brit saved two setpoint points to make it to a tie, but it was her 28-year-old Czech opponent, who finally enforced 8-6.
Raducanu’s disappointment was reinforced when it was broken again in the first game of the second set. After not converting any of the three breakpoints she deserved in the sixth game, it was Muchova who was beaten 6: 4 over the line.
GaISF also went out in straight sentences when compatriot Kessler won a first top 10 victory.
The 25-year-old surprised when she took the first set 6: 4 and stacked the pressure in the first game of the second game.
The second sentence turned out to be just as narrow, but Gauff was ultimately unable to turn it around when she went down 6-4 7-5.
There were no such problems for Aryna Sabalenka in the number one world, which had dispensed with Veronika Kudermetova 6-3 6-4.
The rain also meant that the Italian fourth seed Jasmine Paolini had to wait almost five hours on Match Point against Germany’s Eva Lys.
The players went local time at 2:15 p.m. and approached at 7 p.m. when they finally returned.
Just nine shots later, Paolini had completed a 6-2 7: 5 victory.
Iga Swiadek number two in the world has wasted no time when her match finally got going, and the reduction of Victoria Azarenka 6: 0 6: 2.
Elsewhere, the 11th seed Diana Shraider lost in three sets against Linda Noskova, while there were victories for Jessica Pegula, Elena Rybakina, Paula Badosa, Dayana Yastremska, Sofia Kenin and Clara Tauson.
Additional reporting from PA
