Today in the Monte Carlo semifinals, in one of the great rivalries in tennis, Rafael Nadal and Novak Djokovic will meet for the 43rd time, which is the most frequent Open Era match-up and one of the most evenly contested. The pair has met 42 times in total (Nadal 23-19 Djokovic) – 21 times on hard courts (Nadal 7-14 Djokovic); 18 times on clay (Nadal 14-4 Djokovic); and three times on grass (Nadal 2-1 Djokovic).

MOST ATP MEETINGS IN THE OPEN ERA
42 Novak Djokovic vs Rafael Nadal -> Nadal leads 23-19
38 Novak Djokovic vs Roger Federer -> Federer leads 20-18
36 Ivan Lendl vs John McEnroe -> Lendl leads 21-15
35 Jimmy Connors vs Ivan Lendl -> Lendl leads 22-13
35 Boris Becker vs Stefan Edberg -> Becker leads 25-10
34 Jimmy Connors vs John McEnroe -> McEnroe leads 20-14
34 Andre Agassi vs Pete Sampras -> Sampras leads 20-14
33 Roger Federer vs Rafael Nadal -> Nadal leads 23-10