"Tonight, two great teams played a very competitive game that unfortunately ended after heated exchanges with both teams," he said. "We sincerely regret that this situation occurred."
The brawl Thursday was the latest instance of on-court fighting by China, whose players have been fined tens of thousands of dollars by the world and Asian federations for scrapping with opponents.
Photos from the game circulating on China's popular microblog Sina Weibo show players from both teams pushing one another.
The Washington Post said the melee broke out in the fourth quarter as members of both teams tackled and threw punches at one another. Chairs and water bottles were also thrown as the Georgetown players left the court with about 91/2 minutes remaining.
The Hoyas are in China on a 10-day goodwill trip that has been cited by the U.S. State Department as an example of sports diplomacy that strengthens ties between the two countries' peoples. The team was briefed by the State Department ahead of its departure on what to expect during its trip to Beijing and Shanghai, according to news releases on the university's website.
"We remain grateful for the opportunity our student-athletes are having to engage in a sport they love here in China, while strengthening their understanding of a nation we respect and admire at Georgetown University," Thompson said.
A U.S. Embassy official called it an "unfortunate" incident.