Serena Williams shows off baby girl Alexis in photos, video diary

Serena Williams of the U.S. attends a news conference in Melbourne, Australia, January 14, 2017. REUTERS/Edgar Su

(Reuters) - American tennis star Serena Williams on Wednesday announced the name and released first pictures of her baby girl, revealing that they had spent a week in the hospital following the Sept. 1 birth in Florida because of unspecified complications.

"Meet Alexis Olympia Ohanian Jr." the former world No. 1 and 23-time Grand Slam champion said in postings on her social media sites that included a video diary of her pregnancy.