Nick Kyrgios has admitted that his fitness was lacking during his 6-7(4) 6-2 6-4 7-6(4) defeat to Milos Raonic in the Wimbledon quarter-finals.
The Australian teenager said that his shock win over Rafael Nadal in the previous round took a physical toll and left him with "nothing left to give".
The Mirror quotes him as saying: "I was struggling physically about halfway through the second set. I have nothing left to give. Beating Rafa took a lot out of me but I will work on my fitness and conditioning."
Raonic will take on Roger Federer in the last four of the competition.
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