Professional sports aren't just about being able to make a basket, score a goal, or serve a ball—everyone you're competing against can do that. Especially at the highest level, sports are a mental game. WNBA players—and Skechers ambassadors— Rickea Jackson and Kiki Iriafen agree that being in the right mental space is one of the most important factors when comes to success on the court. On the latest episode of "Nice Talk," Jackson tells Marie Claire editor-in-chief Nikki Ogunnaike that, for her, basketball is "a larger percentage mental than it is physical." "I feel like I always want to be the one that no matter what's thrown at me, I'm prepared," Jackson says. "No matter what's thrown at me, I'm here, I'm level headed. Never too high, never too low." The 25-year-old Chicago Sky player explains that the key is to exist in the moment. For instance, instead of focusing on shots she missed or calls that were made, "I just had to learn to have a short memory in those aspects, because basketball is so quick.…