At the beginning of the year, many commentators predicted that Alexander Zverev has an excellent chance to occupy the first place in the ATP ranking, but this simply did not happen. Moreover, he played worse than last year. Does this mean that in 2017 Zverev reached his ceiling? There is no noticeable improvement in his game. His forehand is still very mediocre, his net play is still bad. By the end of 2018, it seems that Coric and Tsitsipas are more complete players than Zverev. So what's wrong with him?