Key Numbers In The Simona Halep-Flavia Pennetta US Open Semifinal

Simona Halep and Flavia Pennetta are both seeking their first Grand Slam title. Getty Images, AP Photo

Simona Halep and Flavia Pennetta square off in a semifinal lacking the hype of the one featuring Serena Williams. But at least on paper, theirs is even more compelling.

It's not a Grand Slam that's on the line, but both women are looking to get a shot at their first major title. Neither one has ever made it to a US Open final. Both expect a fight.

"To make a winner [against] her you have to finish the point seven times," Pennetta said of Halep.

Said Halep: "I know that she never gives up. ... I just have to play smarter than usual. I have to be aggressive."

Pennetta holds a 3-1 head-to-head advantage, including a 6-2, 7-6 (3) win over Halep in the fourth round of the 2013 US Open. Halep won their most recent meeting, though, on the hard courts of Miami earlier this summer.

Here's a look at some of the key numbers.