March produced a man of the match performance in his first Premier League start since November while Burn played for an hour after recovering from a broken collar bone in Saturday’s 1-1 draw against Watford at the Amex.
March was used alongside Glenn Murray for a time in the second half before Neal Maupay came on up front and his performance impressed Duffy.
He said, “We need everyone fit and Solly is another player who on his day can be the best player at the club - he knows his talent and potential and so do we.
“If you give him a run of games - and he hasn’t had that in a while because of his injury - his potential is there. We just need him firing but he was good on Saturday. We missed Dan a bit. Bernardo has done well, but Dan gives us something different and it was good to see him back out there. They are important players for us going forward.
“Everyone is coming back to fitness now and that’s what we need. We’ve got the break so we can take our minds off things and have a breather for a few days but we’re looking forward to Sheffield United away in a couple of weeks.”
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Albion are still looking for their first win of 2020, but Duffy insists that the mood in the camp is still good and believes that the points they picked up against West Ham and Watford from losing positions are evidence of the positive atmosphere in the squad.
He added, “We’re all quite positive, because the performances certainly in the last two games have been there. We have had a never-say-die attitude which we had at the start of the season and it’s nice to get that bit back.
“We are a confident group, but we’ve seen good teams go down in the past so we’re aware that we need to keep grafting and keep going.
“In the last two weeks we’ve kind of gone back to basics a little bit. We want to stick to the way we play but there are going to be moments where you can’t do it. Watford had two banks of four and were hard to break down on Saturday, but we stuck at it and we got our rewards in the end.”