Complex sentence: After turning pro, Zvereva won four WTA Tour singles titles and 80 WTA Tour doubles titles, 18 of them n Grand Slam tournaments: five at Wimbledon, four at the US Open, five at the French Open, and four at the Australian Open.
Split into simpler sentences: After turning pro, Zvereva won four WTA Tour singles titles and 80 WTA Tour doubles titles. Eighteen of them were in Grand Slam tournaments: five at Wimbledon, four at the US Open, five at the French Open, and four at the Australian Open.