premise: The Cedar Grove Open is a defunct tennis tournament that was played on the Grand Prix tennis circuit in 1974. The event was held in Cedar Grove, New Jersey. Ilie Năstase won the singles title while Kim Warwick and Steve Siegel partnered to win the doubles title.
hypothesis: Kim Warwick lost in the singles.
reason: Ilie Năstase won in the singles, not Kim Warwick. We don't know if Kim played in the singles or if she only competed in the doubles. 