Andy Roddick who we all know possess one of the biggest serves in mens tennis is taking on Robin Soderling today in the BNP Paribas Semi-Final. Soderling who also can clock serves at 135mph can back it up with heavy flat groundies off both sides. Andy needs to put more on his shots today. If he leaves anything hanging, Soderling, who proved against Rafa at the French, will tee off and keep Andy running for his life.

What do you think Andy needs to do today to win?