4. Jerzy Janowicz
The massive 68 pole first came to the popular attention of most people in this years Wimbledon. Reaching the semi-final against Britains Andy Murray was Jerzys best result to date, proving to be a tricky opponent, taking a set out of the eventual champion of the tournament. The 22 year old has risen rapidly through the rankings recently, now sitting at 14th, a career high. His playing style causes problems even for the top players, with an incredibly fast serve utilising the height advantage. His height also gives him great hitting power, which he mixes with a variety of shots including an effective drop shot. The youngster is set to break into the top 10 within the next year or so, if he can recreate the performance of Wimbledon 2013 in the US open he has every chance of reaching a similar stage of the tournament.