@AnimeDefender: The reason why I brought Videl is because she would want Gohan to train considering she does that all the time. She could be like..Gohan go to another planet and train.
plus even if Goku did not showed, Gohan would still get Mystic since Supreme Kaioshin would take him to the Kaioshin realm and train...later testing the sword with Caching and breaking the sword. Old Kaioshin then wakes up Gohan.
but on topic... I say Vegeta on round 1 and Gohan on round 2.