Maria Sakkari says feeling nervous in tight moments is a normal part of the game as even the greatest such as Rafael Nadal and Roger Federer experience those feelings on the court. Sakkari broke into the top-10 after last year’s US Open and now she is enjoying a career-high ranking of No.6 in the world. There is a much bigger expectation and pressure on Sakkari now but so far she has been dealing well with it. “I will mention Rafa, Roger, they are all nervous. I mean they are used to it a little more than us, not a little but a lot more than us (smile).I think there are still times when they are nervous and still feel the pressure. I think that’s part of the game. You just have to accept it, accept …