Amanda Seyfried is said to be dating sports entrepreneur Franck Raharinosy.

The 'Chloe' actress - who recently split from Ryan Phillippe after five months together - was spotted enjoying the tennis at the US Open with the hunk earlier this week, and the pair have been putting on their fair share of public displays of affection (PDA).

An onlooker told E! News: "They were being cute together. It was clear something was going on. There was subtle PDA."

However, it's unlikely the new couple are being open with their feelings, as Amanda - who dated her 'Mamma Mia!' co-star Dominic Cooper for three years - recently admitted she likes to keep men guessing, and thinks "mystery is really sexy".

She said: "I don't think men find me irresistible at all. I've got a filthy side and a romantic side - I like to keep them guessing."

"Mystery is really sexy. Bad guys also tend to be really self-centered and very fearless - I don't know why but that is sexy. It shouldn't be, it's disgusting."