By Jimmy Courier
"It’s hard to get my head wrapped around the physical effort I saw Sunday night in Melbourne, even a few days later. The tennis Novak and Rafa were able to summon late in the match boggles my mind. Ivan Lendl and I were talking about it Monday morning on our way back to the States, and both of us were shaking our heads and asking the same question: How could they possibly not cramp up out there? Ivan and I were known to be among the fittest of our time, but neither of us felt like we could have possibly made it through the way those guys did. It was a hot night (Novak changed his first shirt at the 30-minute mark) and the rallies were brutal from the get-go.
Whatever it is that these guys are drinking/eating on court, I want some immediately to stave off my jet lag."
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http://www.tennis.com/articles/templates/features.aspx?articleid=16176&zoneid=9