5 oldest US Open women's singles champions in the Open Era

#2 Serena Williams (2014)

2014 US Open Champion Serena Williams

Serena Williams has won the most Grand Slam titles among all players - active or retired -after turning 30. She has captured 10 Majors in her 30s, and it seems likely that she will add a few more before calling it quits.

The 2014 US Open saw the top seed and World Number 1 Serena aiming for a hat-trick of wins at the US Open. She was also attempting to equal Chris Evert's Open Era record tally of 6 US Open titles.

It was one of Serena's most dominant displays in a Grand Slam tournament as she won the tournament without dropping a single set, beating Caroline Wozniacki in the final. She was 32 years, 346 days old at the time.

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#1 Flavia Pennetta (2015)

Flavia Pennetta with the 2015 U.S. Open Trophy

The 2015 US Open grabbed a lot of attention, with Serena Williams at the centre of all of it.

The American was attempting to become the oldest ever athlete to complete the Calendar Slam. Having won the previous three Grand Slams of the year in commanding fashion, Serena was expected to breeze past the competition in New York.

However, things didn't go exactly as she would have liked as Italy's Roberta Vinci, against all odds, stunner her in the semifinals.

Another player from Italy was scripting a fairytale story of her own: 26th seed Flavia Pennetta. Pennetta beat the likes of Samantha Stosur, Petra Kvitova and Simona Halep to make the final, which saw two Italian women square off against each other for the very first time in history.

Pennetta won the US Open in her last ever Grand Slam appearance, as she announced her retirement after the completion of the tournament. She became only the second Italian woman to win a Grand Slam title; she did so at the age of 33 years, 199 days, making her the oldest female player to win the US Open.