Williams has been undoubtedly playing extremely well on clay but I think this a good spot to take Hradecka with the handicap. I can easily see a straight set victory for Williams but Hradecka has been serving extremely well, being broken only 3 times total in her last 3 matches on this surface. So I think she will be able to hold serve enough times for the +6.5 to hit. A 6-3 6-3 type victory for Williams will cash this, but might need her to keep atleast one of the sets much closer, as Williams is capable of taking a set in a 6-1 6-2 fashion