Photo by Christopher Huber Brother and sister Tyler and Alisa VanGrunsven, of Skyline High School, fed off their sibling rivalry to propel them both to the 2010 4A state tennis tournament.

Photo by Christopher Huber Brother and sister Tyler and Alisa VanGrunsven, of Skyline High School, fed off their sibling rivalry to propel them both to the 2010 4A state tennis tournament.