a) Rafael Nadal
b) Novak Djokovic
c) Dominic Thiem
d) Alexander Zverev
Roger Federer and Rafael Nadal, two of the greatest tennis rivals will face each other for the 40th time in their careers today in the second semi-final of Wimbledon 2019. The epic clash will follow the first semi-final between Novak Djokovic and Roberto Bautista Agut.