Previously I always thought it was just tactical and technique, but every match has become almost mental and physical—I try to push myself to move we… - Roger Federer

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Previously I always thought it was just tactical and technique, but every match has become almost mental and physical—I try to push myself to move well. I try to push myself not to get upset and stay positive, and that's what my biggest improvement is over all those years. Under pressure I can see things very clear.