Cilic had beaten Sam Querrey in Friday’s semi-final to leave him one win away from a second Grand Slam title.
But he won just eight games in the final and at one point broke down in tears on the court because of the pain.
And now he spent it became clear on Saturday that the blisters were going to be a serious problem.
“I got a really bad blister,” Cilic said.
“Even I felt it in the match with Querrey in the semis.
Marin Cilic admits he felt the blister during his semi-final match against Sam Querrey
Marin Cilic took a medical timeout during the final with Roger Federer
Even I felt it in the match with Querrey in the semis
“Fluid just came down under my callous in the foot.
“I want to thank the physios here, Alejandro and Graham and Dr. Phil.
“They helped. The last 30 hours, they were just constantly almost with me.
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“They did as much as they could, but unfortunately I still felt the pain.”
Federer was ruthless in the face of his opponent’s injury, playing a near-perfect match of tennis to complete a Grand Slam tournament in which he did not drop a single set.
Marin Cilic breaks down in TEARS during Wimbledon 2017 final Sun, July 16, 2017
Marin Cilic broke down in tears during the Wimbledon final against Roger Federer.
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The Swiss was sympathetic to his opponent’s pain afterwards, bemoaning the “cruel” fate that had left him hampered.
And Cilic added that they had not even been able to block out the pain properly because of the nature of the injury.
“We even tried with some anesthetics just to block the pain,” Cilic added.
“But in that area it's very difficult because it's hard skin. It helped, but I still felt some pain.
“Even when I was warming up for the match, I was trying to test myself in exercises with change of direction.
“Really I was too slow basically to react. I knew that it's going to be difficult. But I tried.”