After both exchanged serves in the following two games, a more experienced Zhang then delivered a dominant performance in the tie-break to seal the first set.
"But I told my players it is the utmost honor to play for the national team," he added.
On the Dongguan side, Shen Yi nailed 13 points, while Hu Ke added 10.
Cavani was left out of the Celeste squad by head coach Oscar Tabarez, paying the price for having not played since March.
In other fixtures on Sunday, Fortaleza was held to a goalless draw by Atletico Goianiense, Coritiba drew 0-0 at home to Sao Paulo and Botafogo tied 1-1 at home by Athetico Paranaense. Enditem
In the first competition day of Wuhan Zall, team of the hardest-hit city, fans are gathering with strong passion. For some, the fighting sprits of the matches may encourage them to overcome the stressful times.
The remaining matches in the eastern half of the draw are scheduled to be played in a centralized venue from November 18 to December 13. Enditem
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.
"He is now playing more regularly and doesn't have any injury concerns which bodes well for us."
The 2014 world champion has been hit with full vigour by the unpleasant effects of the COVID-19 pandemic.
It was also the 96th victory at Roland Garros for the Spaniard, who is seeking a 20th Grand Slam title to equal Roger Federer's record.