It's funny because, growing up, I found inspiration from watching Steffi Graf and Amanda Coetzer, a South African who was in the top 10 for many years. Oh, and then there's someone I've gotten to know over the last few years: Martina Navratilova.

Coming from a country that loves tennis, actually, there are a lot of people who play. We definitely face a lot of challenges when it comes to producing tennis players.

Growing up, I did quite a bit of reading on the mental side. My dad, who coached me, had us doing a lot of different types of mental work, like visualization. I read a couple of tennis books that talked about calming your nerves, belief, visualization, relaxing, breathing.

It started with my parents, my dad who taught me growing up, my brother who played as well. I spent a lot of time with him. Then, getting into the pro side, there have been a lot of people who have worked with me along the years.

It's sometimes tiring to get off a long-haul flight and go straight to the studio for a shoot, but if you really plan everything well, you can get so much out of combining travel with work.

Almost 70 percent of U.S. ag exports travel the upper Mississippi River and the Illinois waterway system.

It comes down to building your own world out here on the road. It's who you surround yourself with. My band and crew are really positive guys.

For the Trump brand name, when we build, we want only the best buildings in the world. We travel a lot to see real estate projects worldwide, and we always study what can be done better. There's no question about it: a Trump Tower has to have the very best quality, amenities and facilities. People want that ultra-luxurious lifestyle.