It was the first time during the 2018 event it had been invoked, and Cilic was not happy. "Then first match, for the final, to play with the roof closed, it's difficult. "With the roof closed, it was way, way cooler than I expected. "I had a slow start in the match, losing straightaway my two service games, then catching up most of the time." "I had tough matches, tough opponents, beating Rafa (Nadal), reaching here a final, which is definitely amazing.

Source: The Nation Bangkok January 28, 2018 13:52 UTC