But the Hawks boss says it’s not quite must win yet.
Havant are five points away from the safety line with time running out for them to make their National League stay more than a one-year thing.
They will be taking on a side with a score to settle.
Havant thrashed Alan Devonshire’s team 7-0 back in October but it’s the Magpies who have since flown away from trouble.
Bradbury told the club’s website: “I think the three points on offer are the biggest that we have played for this season.
“If we win we can put Maidenhead into that mix down there, but if we don’t then we have got a lot to do and relying then on trying to catch Dover, but then saying I think there’s a couple of others I feel we can catch.
“I think we need to go and win four games and try and get a draw or a couple of draws off the back of them as well.”
Bradbury added: “I think it’s a big game and I think Maidenhead will be hurting from the result at our place earlier on in the season and will want to reverse that outcome.
“I think it’s not a must win, but time is getting shorter.
“We are running out of games, we need to make sure that we give everything that we can.”