We know Roger is a great indoor player due to the elimination of various factors like sun and wind. If he were to hypothetically face off against Nadal in the final, would a closed roof due to rain help him at all with his serve? Has anyone noticed any changed in the indoor grass game during the few times the roof has closed since 2009? To me, it seems like a pretty similar game indoors vs. outdoors but it would be interesting to see if Roger gains an advantage with a closed roof due to the fact that he plays with less margin for error than Nadal. Which player would be helped most by the closing of the roof?