The key shot tonight will be the backhand down the line- who can change direction better during the endless crosscourt bh rallies. I reckon it will be Agassi, this is something he did more effectively than Hewitt the last two times they met. Hewitt is just to risk-averse and Agassi
moves him around the court well.
However, if Agassi's strokes are off and he makes too many erros, then Hewitt will take full advantage with his counter punching style.