Grigor Dimitrov

Grigor Dimitrov's backhand drew early Federer comparisons for its shape, but his best weapon on that side is the low, skidding slice he mixes with topspin drives and lobs. The variety suits grass and fast hard courts. He won the 2017 ATP Finals, reached a career high of third and has played Grand Slam semi-finals at three of the four majors. Watch for how often he changes height and spin within one rally.