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Flavia Pennetta shocked the world by winning the US Open on Saturday, 7-6(4), 6-2 over Roberta Vinci. Then the 33-year-old shocked the world again by announcing that she plans to retire.

Forza Flavia! The 2015 #USOpen champ! pic.twitter.com/nAfc5TnQGe

— TennisNow (@Tennis_Now) September 12, 2015

Flavia Pennetta: This was my last match at the US Open and i cant think to finish in a better way #usopen pic.twitter.com/LPT1RT3DjM

— Reem Abulleil (@ReemAbulleil) September 12, 2015

The Italian won the US Open on her 49th appearance at a major, breaking the all-time record, which was held by Marion Bartoli, who won Wimbledon in 2013 in her 47th appearance at a major.

Flavia Pennetta says she made the decision to retire before the US Open. More details to come...

— WTA Insider (@WTA_insider) September 12, 2015

Though there seemed to be some confusion about when Pennetta will actually hang up her racquets, she told TV reporters after her announcement that this was her last US Open, not her last tournament

Flavia Pennetta will play until the end of 2015. Then will officially retire from tennis

— Luigi Gatto (@LuisGatTWI) September 12, 2015

@flavia_pennetta No better time to retire- on top and a Champion!! Well done!!!!!

— Jimmy Connors (@JimmyConnors) September 12, 2015

Wow!! @flavia_pennetta talking about finishing off in style!! Couldn't happen to a nicer person! Congratulation and happy retirement!!💃🎉🏆

— Caroline Wozniacki (@CaroWozniacki) September 12, 2015

you will be missed beyond words bella @flavia_pennetta ❤️ happy retirement!

— Sloane Stephens (@SloaneStephens) September 12, 2015