After Shaanxi narrowed the gap to five points, Wuhan pulled away as four players connected on 3-pointers in a row, and led 40-35 at halftime.
The "BVB" controlled possession and should have added another goal to its lead before the break but Freiburg's goalkeeper Florian Muller was on guard to defuse the efforts from Thomas Meunier and Mats Hummels in the closing period of the first half.
Shortly after the second, Xinjiang used another 13-2 spurt to put the game out of sight as Wuhan's shooting froze up.
The two-time Grand Slam winner committed just seven unforced errors throughout the one-sided encounter and broke her opponent's serve six times.
"If you win 4-0, you have to be happy. We will analyse today's game in a couple of days but for now we are delighted. Today it was important to be effective when it mattered most," Union head coach Urs Fischer said.
The South American zone 2022 World Cup qualifiers were scheduled to begin in late March before being suspended because of the global health crisis.
Osasuna didn't play in midweek as its scheduled match against Granada was postponed to allow Granada to play in the Europa League, and the side from Pamplona should be fresher than Celta Vigo, who travels to the remodeled El Sadar Stadium after losing 3-0 at home to Barcelona.
People run with dogs during an annual "Fast Dog" race in Moscow, Russia, on Oct. 3, 2020. More than 140 people took part in the race this year. (Photo by Alexander Zemlianichenko Jr/Xinhua)
Like Baum, pundits such as Lothar Matthaeus have discovered that the Royal Blues squad lacks the speed that modern football requires.
Khachanov won the pair's previous encounter in Paris - at 2018 Paris Masters, when the Russian claimed a straight-set win in the final to clinch the biggest title of his career until now.
The financial impact of the pandemic on football has been apparent, the former Leipzig coach said.