We travel to the City Ground on Wednesday March 2 for a 7.45pm kick-off with the winners on their way to St James Park for the quarter-final on the weekend of March 12/13.
Head Coach Martin praised Forest for their performance in Sunday's 1-1 draw in the fifth round at the Lane and, as always when draws are made, opts not to look too far ahead.
"I don't like to talk about a game against Newcastle because we have to play Forest first and that's more important," said Martin.
"Forest did well and all credit to them but I thought if we could score a second goal they would have to open up and it would be an easier game.
"We did everything right in the first half. We had five or six good chances, they had three. It is always difficult if you don't score a second.
"At the end they could have scored a second, so all credit to them. Maybe we are happy to go there and play another 90 minutes.
"It will be harder at their place but our team against a Championship side means we still have a great chance of going to the next round.
"If we get through to the next round we play Newcastle, it's not the best of draws to be honest but I think we have a team that can play well away from home."
Martin Jol refused to look beyond the replay against Forest after we drew Newcastle away in the quarter-finals of the FA Cup.