Serbia’s Filip Krajnović is best known in the tennis world for his many ITF Futures and ATP Challenger tour wins. He has also played a part in his country reaching three Davis Cup semi-finals and four quarter-finals. He has reached the third round of the Australian, French, and US Open tournaments and was runner-up at the 2017 Paris Masters. A professional since 2009, he spent two years ranked 101st in the world before solidifying his Top 100 pos...