#8. Jack Sock
Last year, aged 22, Sock became the youngest American to reach the fourth round of the French Open since Pete Sampras in 1993. He ended the year in the Top 25 of the ATP rankings. This year, Sock began his season by reaching the final of the Auckland Open where he upset David Ferrer in the semi-finals. After a disappointing outings at the Australian Open and the Rio Open, Sock ended the hard-court season with third round exits at Indian Wells and Miami.Sock began his clay-court season by reaching the final of the US Men’s Clay Court Championships where he was shockingly defeated by 148th ranked Juan Monaco.
This was followed by third and second round exits at Madrid and Rome respectively. Sock ended his clay-court season with a third round exit at the French Open which was followed by another third round exit at Wimbledon.Sock began his US Open Series by reaching the quarter-finals of the Citi Open which was followed by a third round exit at the Rogers Cup. At the US Open, Sock reached the fourth round of a Grand Slam for a second time after defeating 2014 champion Marin Cilic in the third round in straight sets. However, he lost in the fourth round to Jo-Wilfried Tsonga.At the Shanghai Masters, Sock stunned Wimbledon runner-up Milos Raonic to reach his first Masters 1000 quarter-final where he was beaten by Gilles Simon.
This was followed by his fourth ATP final at the Stockholm Open where he was beaten by a resurgent Juan Martin Del Potro. He ended his Tour by reaching a second Masters 1000 quarter-final at Paris. He ended the year ranked 23rd, his best year-end ranking.The 6ft 3in tall American has put in some really promising performances this year which just keep on strengthening the belief that he will be tomorrow’s Grand Slam winner and provided he works on his fitness, he could well win one.