That is true.
However, when I play Grand Slam Tennis on the Wii, I find I am able to win the points much faster whan I come to the net and put the volleys away (against the computer and against on line human opponents). The extra court speed takes away the time for the baseline player to run and reach the ball after a volley. Even if they do just reach the first volley, the second or third volley will kill the point quite rapidly with proper placement.
Now, it is open to debate as to how close to reality this is
. Maybe this is an area where Andy can improve to earn easy points and conserve his energy ?