2014 US Open champion Marin Cilic was happy that he didn't fail to deliver against world No. 448 Kacper Zuk as he entered their ATP Cup clash not knowing much about his opponent. Cilic, ranked at No. 38 in the world, was preparing to play rising Polish star Kamil Majchrzak but the Pole was forced to withdraw from the match and Zuk replaced him.
Zuk, who never played an ATP match before, performed above the expectations as former world No. 3 Cilic had to work hard to earn a 7-6 (8) 6-4 in just over two hours of play. Zuk, 20, was on the brink of taking a set off Cilic but failed to do so as the Croatian saved a set point in the first set tie-break, before converting his sixth set point to win a tight first set.
"The level was very good again. Good serving. Today, if I have to pick some things that I need to do better, it's just converting break points. I had a lot of them," Cilic said, per the ATP Cup. "But otherwise, I felt that the level was quite good. I was being aggressive."