Mats Wilander: "Serena Williams has crossed the boundaries of sport"

All the sports stars have paid tribute to Serena Williams these days. Speaking to Eurosport, Mats Wilander highlighted the enormous impact of the US star. He explained:"Serena has meant a great deal not only for the world of sport, but also for the United States in general. She has taken women's tennis to a completely different level, pushing the boundaries of the sport. We will remember her above all for her fighting spirit. She has never given up, indeed she has always reacted in the face of a