How big is Novak Djokovic's influence in Serbia these days?

So big that a visiting American actress picked up playing tennis on the gravesite of one of the most legendary monsters in history.

In a recent interview, actress Maggie Grace - best known for her roles as Liam Neeson's daughter in "Taken" and as spoiled, beautiful Shannon on the TV show "Lost", talked about her experiences in Serbia while filming the prison movie "Lockout." Spending most of her time indoors on the movie, Grace sought an outdoor activity and found it much to her liking.

"I did pick up tennis there, which I figured was the perfect place," Grace told the website Nerdist.com. "There's quite a national fervor the sport right now, with Djokovic and everything. So it's easy to find good coaches. I learned tennis over what they say is Vlad the Impaler's grave, and this moat around this Roman ruins. And they happened to have red clay tennis courts in them, it's the perfect place to learn."

Vlad the Impaler was the inspiration for the original Dracula. Grace knows a thing or two about vampires - she's starring in the final film of the "Twilight" series, "Breaking Dawn Part 2" this November.

She's not the only famous actor spending time in Serbia these days. Djokovic himself has a cameo in the upcoming action film "The Expendables 2", which filmed in his home country last summer.

(via Nerdist)