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Jessica Alba, Amanda Seyfried, Justin Long, right, and Alexander Skarsgard, US Open

Louis Lanzano /Landov

The 2013 U.S. Open was quite the place for celeb couples this year.

In addition to PDA cuties Justin Timberlake and Jessica Biel, new couple Amanda Seyfried and Justin Long were spotted together enjoying games at the USTA Billie Jean King National Tennis Center in NYC.

Seyfried and Long were cuddled up in their seats while watching the Men's U.S. Open finals between Rafael Nadal and Novak Djokovic. The 27-year-old actress sported big glasses and a denim top while her man, 35, donned jeans, shirt and jacket.

Sitting close by to them were celebs like Alexander Skarsgard and Jessica Alba.

Also taking in some tennis matches were Kaley Cuoco and her boyfriend Ryan Sweeting, who watched Nadal win his second open in four sets from the Heineken Suite.

The Big Bang Theory star wore trendy sunglasses and a blazer while her guy looked preppy in a blue sweater over a blue button-down shirt.

Other stars who've been spotted enjoying the U.S. Open over the past week include Kate Upton, Rainn Wilson, Olivia Wilde and Jason Sudeikis, Katie Couric and Kevin Spacey.

Kaley Cuoco, Ryan Sweeting

Courtesy: Ron Angle