Timothy John Mattek has been married to Heidi Mattek for 38 years and has 4 children. The oldest is Bethanie Mattek-Sands. She is an Olympic Gold Medalist and Winner of the 2018 US Open in Mixed Doubles. Second is Alison Mattek. She has her Ph.D. in Psychological and Brain Sciences, her Masters Degree in Digital Musics, a Bachelors Degree in Music Engineering, and is currently working at University of Oregon as a Postdoctoral Researcher in the Computational Social Neuroscience Lab. Third is Chad Mattek. He is a former Officer in the United States Marine Corps and currently works as CP's Head Physical Trainer. Fourth is Andrew Mattek. He played Division 1 Soccer at FIU, is a Co Founder of Complete Performance by Mattek, and currently works as CP's Head Mental Trainer.
Tim is the son of John and Elsie Mattek and has 9 siblings (5 brothers and 4 sisters). Tim was the 7th of the 10 children. Tim grew up with his family near Green Bay, Wisconsin in the Fox River Valley. Tim and Heidi currently reside in Boca Raton, FL.