Premise: Judy Tegart Dalton (née Tegart; born 12 December 1937) is a retired professional tennis player from Australia who won nine Grand Slam doubles titles. She won at least one women's doubles title at each Grand Slam tournament, a "career Grand Slam". Five of her doubles titles were with Margaret Court. Tegart was the runner-up in 10 Grand Slam doubles tournaments.
Hypothesis: Judy Tegart Dalton has 4 children.