Chi Chi may be skilled at hand to hand combat, but she hasn’t mastered her ki abilities as well as the other Z Fighters like Krillin and Yamcha. She may be able to put up a decent fight (and likely win) if Green Lantern took his ring off, but I don’t see how she would be able to break through his shield to knock him down for the count. Hal just has too much will power. Green Lantern wins.