There's a reason why Serbia's Novak Djokovic is the world's number one men's tennis player.
He just keeps on winning and winning.
The pattern continued in Djokovic's opening match against Lithuanian Ricardas Berankis at the US Open in New York.
Djokovic fired off 10 aces. One commentator said he didn't even break a sweat.
Lauren Collins profiles Novak Djokovic in this week's New Yorker.
Considering that tennis was never really a big thing in his native Serbia, and that his parents ran a pizzeria when he was a kid, Djokovic has had tremendous success. And judging from his opening match at the US Open, we're in for some exciting tennis.