The npower League One side earned a replay at the Goldsands Stadium with a 1-1 draw at Wigan and gave Martinez's side a run for their money on the south coast, with Argentina striker Mauro Boselli netting the only goal of the game as the Latics won 1-0 to set up a fourth round-clash with Macclesfield.
Martinez made nine changes to the side that had drawn 1-1 with Fulham in the Barclays Premier League at the weekend and the Spaniard believes the move backs the club's claims to be a place where young talent can be nurtured.
Teenagers Fraser Fyvie and Angelo Henriquez, as well as 20-year-old Roman Golobart, all started in the win and Martinez was pleased with their contributions. When asked if he was taking a chance by naming an inexperienced side Martinez said: "No, it is not a risk, a risk would be not to give the opportunity to youngsters.
"The future of our football club relies on having a strong development path for our youngsters and it is all good for me to say that and not give opportunities to the young players.
"I will always take responsibility for the results but the young players will have an opportunity at Wigan Athletic.
"I'm very proud with the coaching staff and everyone involved because to make nine changes and to be able to be a team and perform in the manner we did today in a professional way should make everyone extremely proud."