Juan Martin del Potro eased into the last 16 of the Miami Open with a 6-2 6-2 demolition of Kei Nishikori and was joined in the fourth round by Marin Cilic.
Juan Martin del Potro eased into the last 16 of the Miami Open with a 6-2 6-2 demolition of Kei Nishikori and was joined in the fourth round by Marin Cilic.