The Swiss and Spaniard great will take to the court against Jack Sock and Frances Tiafoe at The 02 in London following the conclusion of Andy Murray's match against Alex de Minaur.
Third-seed Alcaraz is touted to be the next great and the youngster further rose his stocks about the same with an excellent win over the 15th-seed Croatian. The Spaniard had also met Cilic in the Cincinnati Masters last month, where he had trumped him to advance forward.
Nadal produced another dramatic show on Wednesday at Wimbledon, where the Spaniard held off a high-powered performance from Taylor Fritz to reach the semi-finals in London.