US number one John Isner says the knee trouble that kept him out of the Australian Open is behind him and he's "ready to go" for this weekend's Davis Cup tie against Brazil.
The World Group first-round tie will open on Friday with American Sam Querrey taking on Brazil's Thomaz Bellucci. Then Isner will take on Thiago Alves.
"My knee hasn't been bothering me," said Isner, ranked 16th in the world. "I feel like I'm ready to go."
On Saturday the US sends the formidable doubles duo of brothers Bob and Mike Bryan against Marcelo Melo and Bruno Soares.
Sunday's reverse singles call for Isner to take on Bellucci and world number 20 Querrey to face Alves on the indoor hardcourt at the Jacksonville Veterans Memorial Arena.
The Bryan twins captured a record 13th men's doubles Grand Slam title at the Australian Open last week.
Isner is 5-5 in his career Davis Cup singles -- all on clay and all on the road.
Friday will mark his first home Davis Cup match.
Querrey is just 1-5 in Davis Cup singles, and just like his towering compatriot Isner, he's never played a home tie.
The United States have won the international team trophy 32 times, but fell to Spain in the semi-finals at Gijon last year.
The winner of this tie advances to face the winner of Serbia v Belgium in the quarter-finals in April.
Sam Querrey (USA v Thomaz Bellucci (BRA)
John Isner (USA) v Thiago Alves (BRA)
Bob Bryan/Mike Bryan (USA) v Bruno Soares/Marcelo Melo (BRA)
John Isner (USA) v Thomaz Belucci (BRA)
Sam Querrey (USA) v Thiago Alves (BRA)