FEDERER-NADAL BY THE NUMBERS

60 - The number of ATP Masters 1000 the two have won. Nadal holds the record with 33, Federer has won 27

INDIAN WELLS, United States: Roger Federer and Rafael Nadal will meet for the 39th time on Saturday when they clash in the semi-finals at the ATP Indian Wells Masters -- a quick look at their rivalry by the numbers: 4 - This will be the fourth time Federer and Nadal have played at Indian Wells, with Federer winning 2 of the prior 3 5 - Federer has won the last five matches between the two -- the most recent in the 2017 Shanghai Masters final 8 - Nadal and Federer have played eight times in the United States, with honors even at 4-4 10 - This will be the 10th time Federer and Nadal have met in a semi-final, with Nadal winning 6 of the prior 9 17 - Nadal has won 17 sets more than Federer in their 38 matches (67-50) 20 - Nadal and Federer have met 20 times on hard courts, Federer holding an 11-9 edge 21 - Federer and Nadal have played 21 tiebreakers over the course of their careers, Nadal holding an 11-10 edge in those deciders 24 - The number of finals they have played, with 14 wins for Nadal and 10 for Federer 31 - Federer has held in 31 straight service games against Nadal 37 - Federer and Nadal have won 37 Grand Slam titles between them, Federer with 20, Nadal with 17 38 - The number of matches the two have played against each other, with 23 victories for Nadal and 15 for Federer. It's the third most matches in an Open Era rivalry behind the 53 between Nadal and Novak Djokovic and the 47 between Federer and Djokovic 506 - The number of weeks at world number one (Federer 310, Nadal 196) the two have spent atop the world rankings. - AFP