Polish tennis star Iga Swiatek reveals that one of the reasons he admires Rafael Nadal so much is because fame and popularity have never changed him. Nadal is one of the best players in the history of tennis, but his teammates often describe him as a humble and very nice guy.Swiatek, 20, grew up idolizing Nadal, and once he became a tennis player, he realized that his idol was actually a great person. “In the beginning, I was especially focused on my older sister, Agata. She sneaked me into tennis lessons.I started playing for my father and for her. …