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				 Muchova produced a “tweener” shot between her 
				legs during a memorable exchange in the first set — although she 
				lost that point — as well as an array of slices and other 
				unconventional shots. 
				 
				Muchova improved to 5-0 in her career against Paolini, who was a 
				finalist at the French Open and Wimbledon last year. 
				 
				Tomas Machac then beat Flavio Cobolli 6-1, 6-2. 
				 
				Muchova and Machac will next face Americans Coco Gauff and 
				Taylor Fritz, respectively. 
				 
				Iga Swiatek’s Poland plays Kazakhstan in Saturday’s other 
				semifinal of the mixed team event. 
				 
				The United Cup is a warmup for the Australian Open, which starts 
				Jan. 12. 
				
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