Pennetta, at 33 the oldest first-time Grand Slam finalist in the Open era, on Saturday became the first Italian to win the US Open women's crown with an efficient 7-6 (4), 6-2 victory over compatriot and childhood friend Roberta Vinci.
World number one Novak Djokovic and number two Rafa Nadal set up a mouthwatering men's singles final at the US Open with victories in the semifinals at Flushing Meadows on Saturday.
Czech duo Andrea Hlavackova and Lucie Hradecka won the US Open women's doubles title on Saturday with a 7-6(4) 6-1 6-4 win over Australia's Ashleigh Barty and Casey Dellacqua.
Rafa Nadal said it was hard to accept that Spain had failed in a third successive bid to host the Olympics and described the process as "tiring" for the country.
World No 1 Serena Williams will try to capture her 17th Grand Slam title and become the oldest women's champion in US Open history in a final rematch on Sunday with second seed Victoria Azarenka.
A disappointed Li Na admitted to an attack of stage fright in her humbling US Open semifinal loss to Serena Williams and said she would have lost to any opponent she faced on Friday.
World number one Serena Williams of the United States booked a rematch against world number two Victoria Azarenka of Belarus after winning Friday's semi-final against Li Na of China 6-0, 6-3 in the US Open tennis tournament.
World number six Li Na of China failed to advance to her second Grand Slam final in the season after losing to No 1 seed Serena Williams of the United States 6-0, 6-3 in the US Open here on Friday.
Stanislas Wawrinka made it to his first Grand Slam semifinal on Thursday courtesy of a sweet one-handed backhand and inspiration from bleak Irish writer Samuel Beckett.
Contorting his body while sliding into shots, Novak Djokovic used his typical relentless defense to reach the US Open semifinals for the seventh consecutive year.
The fifth seed Li Na was awarded 2013 "US Open Sportsmanship Award," presented annually to the male and female pros who best demonstrate excellence in sportsmanship throughout the Emirates Airline US Open Series and the US Open.
Andy Murray's US Open title defence ended with barely a whimper as he crashed to a 6-4 6-3 6-2 defeat in the quarterfinals to ninth-seeded Swiss Stanislas Wawrinka on Thursday.
American twins Bob and Mike Bryan fell short in their bid to capture a calendar-year Grand Slam when they lost 3-6 6-3 6-4 in the men's doubles semifinals at the US Open on Thursday.