Nearly a year ago, the tennis umpire Carlos Ramos and Serena Williams clashed during her loss to Naomi Osaka in the women’s final of the 2018 United States Open. Ramos has yet to work another match involving Williams, and it will not happen at this year’s U.S. Open either.

In an interview this week, Stacey Allaster, the chief executive for professional tennis at the United States Tennis Association, confirmed that Ramos would return as part of the umpiring staff at this year’s Open but would not be assigned to matches involving Williams or her older sister Venus.

“We don’t need to go there,” Allaster said in a telephone interview. “There are more than 900 matches here over the three weeks, and there are lots of matches for Carlos to do.”

Allaster said tournament officials did not want to create a distraction by putting Williams and Ramos back on the same court.