Djokovic still No. 1, Zverev close to No. 3
Novak Djokovic becomes the first man to fall outside the top 20 and finish the same season as No. 1.
Rafael Nadal after skipping last year tournaments ends the season as No.2.
Alexander Zverev, after winning ATP Finals climbing above Del Potro to achieve a final ranking 4th position just 35 points behind No. 3 Roger Federer.













