Grigor Dimitrov – the current world number three had a career-best year in 2017 winning four titles including his first Masters 1000 tournament as well as the ATP Finals. After giving Nadal a tough fight in last year’s Australian Open semi-final, he has started 2018 well by reaching the semi-finals of the Brisbane International. Dimitrov, nicknamed ‘Baby Fed’ for his similar style of play to Roger Federer, has never reached a Grand Slam final but just may be the surprise finalist this year in the weakened field.
Alexander Zverev – the current world number four also had his best year in 2017 winning five titles including two Masters 1000 tournaments with victories over Djokovic and Federer. His best Grand Slam showing is the fourth round at Wimbledon 2017. He will need to work hard to improve on that record and he will want to prove that 2017 was no fluke.
Who Are Roger Federer's Kids? Know All About Federer's Twins