Liu, who boasted a stellar playing career, was named WTT chief in June.
Nishikori needed six match points to seal the win in two hours at the ATP Masters event held behind closed doors at the Foro Italico.
In the women's draw, US Open quarterfinalist Elise Mertens of Belgium disposed of Chinese Taipei's Hsieh Su-Wei 6-3, 6-1.
The battle for the second place remained tight until the final kilometers, as Rio Olympic Games runner-up Cai, representing Team Yunnan, held off a strong challenge from London Olympic champion Chen to finish second in 1:22:03. The 28-year-old Chen of Guangdong trailed nine seconds further behind to take the third place.
"To have kept the team together might turn into our big advantage," Borussia's managing director Max Eberl said.
Bayern chairman Karl-Heinz Rummenigge sees BVB as being the club's most dangerous rivals this season. "They have had a much longer break and preparation," the 64-year-old said.
MADRID, Sept. 16 (Xinhua) -- FC Barcelona coach Ronald Koeman has admitted he is pessimistic about the club's chances of strengthening its squad before starting the new season.
"His inappropriate words are inconsistent with the social responsibilities and values abided by our club and have brought serious adverse social impacts to the club and the league. We will not sign him for the new season," said Fujian Sturgeons in a statement.
Meanwhile, the states of Schleswig-Holstein and North-Rhine Westphalia announced that they would consider higher rates of occupancy, up to one third of the arena capacity. Enditem
The 22-year-old Ge set a new personal best of 22.69s this May, aiming to qualify for the postponed Tokyo Olympics final. "I was too hasty to concentrate, when I heard some noise I thought it was the gun," she said.
Ricardo Goulart's volley gave Hebei a 10th minute lead before Guoan midfielder Renato Augusto made it 1-1 with a glorious chip in the 28th minute.