Even when she won the Division I state doubles championship as a New Albany High School senior in 2010, Maddie Kobelt gave no thought to becoming a professional tennis player.

Only as she was in the middle of winning more than 100 matches at Syracuse University, about the same time her older brother went pro, did Kobelt consider structuring her post-college life around her beloved sport.

Kobelt is in her fourth year as a pro, and Peter Kobelt is in his sixth season. Both compete primarily on the International Tennis Federation circuit.

Their father, Paul Kobelt, is owner of the New Albany Tennis Center and a veteran teaching professional.

"It's a blessing," Maddie said. "I learned a lot more about (being a professional) while I was in college. Before that, I'd done just (United States Tennis Association) tournaments but as I found out more, this was really what I wanted to do."

Peter Kobelt, a four-time All-American at Ohio State from 2011-14, has four singles wins and 10 doubles championships on the ITF circuit since 2013. He is 21-6 in singles this year and 151-87 overall, and currently is ranked 425th in singles and 889th in doubles.

Kobelt has won two tournaments in Israel this year, the Israel F5 Futures in early May and the Israel F6 futures the next weekend. He went a combined 10-0 in the two events, not dropping a set until he beat Matias Franco Descotte of Argentina 6-2, 4-6, 6-3 for the F6 championship.

"I think I might be playing some of the best tennis of my career," he said. "The past two or three months, I've had some of my best success ever."

Maddie Kobelt has been a part of 10 doubles championships, including three in as many weekends in May in Israel, and was ranked 967th in singles and 431st in doubles before participating in the National Bank Challenger, a $25,000 tournament, beginning July 11 in Winnipeg, Manitoba.

She teamed with Maya Tahan to win the Joyce Eisenberg tournament that concluded May 6, before winning the Sajur tournament with Iva Primorac and Tiberias event with Riya Bhatia.

"I switched my racket in March (from Wilson to Head) and that's helped my game," Maddie said. "Mentally, I am not putting too much pressure on myself. I'm taking things one shot at a time. My new racket gives me my power on my shots. Sometimes it's mentally refreshing to make a switch. It can help you get better results."

Peter Kobelt capped his New Albany career with the Division I state singles championship in 2009, after finishing as state runner-up the year before and winning the 2007 Division II doubles title with Skyler Engel. Kobelt went on to win 265 matches between singles and doubles at Ohio State, finishing as national runner-up in doubles with Kevin Metka his senior year.

Maddie Kobelt started fast in college, going a team-best 35-15 as a freshman at Syracuse in 2011 and finishing 103-72 overall. She was 51-38 in singles and 52-34 in doubles.

Younger brother Alex, a 2015 graduate of New Albany, helped Ohio State to a national runner-up finish in May. He went 7-4 in singles and 1-1 in doubles as the Buckeyes finished 34-3, losing to Wake Forest 4-2 in the national final May 22.

Peter Kobelt also won the Egypt F11 Futures doubles championship April 1 with Lucas Miedler of Austria and finished second in the Israel F8 Futures in June.

"Four years ago, I thought I knew a lot about tennis," he said. "I know so much more now, so much about my game. I'm way better than I was. I know how to react to certain things, how to eat better, condition better, things like that.

"(Ohio State coach) Ty Tucker played a huge part in my development. Once I got on tour, I found out initial game-planning doesn't always work. The bottom line was I needed to become more consistent, and I think I have. I play more defense now and I play longer points. Playing more defensively can be fun. It definitely takes confidence."

Kobelt said he has made a choice not to clock his serves.

"I've been told I've served as fast as 135 or 145 mph," he said. "I might take a peek if the speed is displayed (during a match) but to me, it's not such a huge deal."

Paul Kobelt emphasized strong volleys to Peter and Maddie growing up.

"Our dad is 6(-foot)-9. Volleys were a big thing," Peter said. "We worked on that at a young age."

Peter and Maddie see each other only occasionally, although they keep in touch via texting, phone calls and social media.

"Peter stays overseas more than I do, but we always find a way to keep in touch," Maddie said. "We understand everything that goes into being on tour. That's such a luxury. Our family gets it. We're all invested. We know we can go to each other for support whenever we need it. It's such a different lifestyle."