Nicolas Mahut

The Latest on US Open: Serena offers congrats to Pennetta

The Latest on the U.S. Open (all times local):

5:45 p.m.

Flavia Pennetta's first major title — and surprise retirement announcement — drew congratulations from around the tennis world.

Serena Williams, whose Grand Slam bid ended Friday with a stunning U.S. Open semifinal loss to eventual runner-up Roberta Vinci, tweeted: "congrats I'm so happy you won. You deserved it. I am also happy for the rest of your life's journey. I will miss your smile."

Pennetta is the second Italian woman to win a major championship. The first, 2010 French Open winner Francesca Schiavone, tweeted: "Fla, welcome to the club."

Some other reactions from current...