Ady Adams believes his side cannot afford to switch off, even for a few minutes, during their crucial clash with Old Georgians tomorrow.
Second-placed Havant travel to their promotion rivals knowing they must take at least a point from the game to maintain their South League premier division one title bid.
It is also the final match before the winter break and both sides will be keen to finish the first half of the season on a high.
Adams’ side defeated Staines 2-1 last weekend but were guilty of letting their opponents back into the game.
However, the Havant manager knows they cannot slip up against a side who have scored 49 goals already this season.
‘It was a bit nervy against Staines and if we have a spell like that this week we’ll be in a lot of trouble because we’re playing a lot better side,’ said Adams.
‘We just switch off that little bit and the opposition sense it and we have a five-minute spell where the opposition go for it.
‘Obviously, I would have liked to have gone into the game on the back of scoring seven or eight goals.
‘But having a game like this, where I’ve been able to highlight one or two things we did wrong, maybe that stands us in good stead for tomorrow.’
The trip to third-placed Old Georgians will also pit the league’s top-two goalscorers against each other – former England international James Tindall and Havant’s own Sandeep Singh.
Tindall leads the scoring charts with 19 goals, with Singh just behind on 17.
If the hosts win tomorrow, they will move level on points with Havant and could leapfrog them into second place depending on their goal difference.
Adams added: ‘We’re going to go in a little less gung-ho and think about how we’re going to defend a bit tighter because they are going to be a goalscoring threat.
‘It could be a 5-4 or a 4-3 scoreline.’
Elsewhere, the second string play Hamble at Havant College in Hampshire/Surrey regional division one (4pm).
The ladies’ second team travel to Yateley in Hampshire League division one.