Following his US Open victory, Čilić played for Croatia in Davis Cup World Group playoffs against Netherlands. Initially signed up for doubles rubber only, Čilić and teammate Marin Draganja beat Robin Haase and Jean-Julien Rojer. After a 2:2 tie between two countries, however, Čilić stepped up and played the deciding fifth singles rubber in place of young compatriot Borna Ćorić, where he defeated Thiemo de Bakker. The victory earned Croatia the World Group status for 2015.