The tennis umpire who penalised Serena Williams in the US Open final is pleased to be getting back to work.

Carlos Ramos is assigned to the Davis Cup semifinal between Croatia and the United States this weekend in Zadar.

“I’m just focusing on this tie and working again. That’s all I can say,” Ramos said before the opening singles rubber between Borna Coric and Steve Johnson.

Ramos was the chair umpire for the second singles between Marin Cilic and Frances Tiafoe.

Ramos gave Williams three code violations in her straight-sets loss to Naomi Osaka last weekend, and the American great argued she wasn’t being treated the same as some male players.

USTA president and CEO Katrina Adams, who defended Williams, was overheard apologising to Ramos on the sidelines of Thursday’s draw ceremony.

Ramos wouldn’t go into details over his discussion with Adams, who initiated the conversation.

“You know I cannot talk about that,” Ramos said.

Coric beat Johnson for Croatia to lead 1-0.