Ricky Dimon of The Grandstand and Pete Ziebron of Tennis Acumen preview and pick two of the men’s singles matches on Monday at the French Open. Fourth-round action includes Rafael Nadal vs. Jack Sock and David Ferrer vs. Marin Cilic.

Jack Sock vs. (6) Rafael Nadal

Ricky: This is tennis’ Revolutions Per Minute on the Forehand Bowl. Sock is the only player on tour who hits with more RPMs on his forehand than Nadal. Unfortunately for the 22-year-old American, a place in a Grand Slam quarterfinal is not decided by RPMs. That being said, he should be able to make this one competitive. Sock is playing the best tennis of his life–by far–with a fourth-round showing in Indian Wells, a title on the red clay of Houston, and French Open victories over Grigor Dimitrov, Pablo Carreno Busta, and Borna Coric. The world No. 37 has never faced Nadal and…