I know it's too early to call, but these two are in the fifth set on serve and have not broken each other since the second set; just like the Wimbledon marathon match. Also, the scoreline between these two is almost identical compared to the match between Isner and Mahut.
Score is currently: 6-4, 3,6, 6-7, 7-6, 6-6 - John Isner.
Wimbledon Marathon: 6-4, 2-6, 6-7, 7-6, 70-68.
A long way off from it being considered a marathon when compared to the Wimbledon match, but hey it's a possibility! Isner and Cilic are both serving giants.
Score is currently: 6-4, 3,6, 6-7, 7-6, 6-6 - John Isner.
Wimbledon Marathon: 6-4, 2-6, 6-7, 7-6, 70-68.
A long way off from it being considered a marathon when compared to the Wimbledon match, but hey it's a possibility! Isner and Cilic are both serving giants.