Havant were beaten 25-13 at Tring in the battle between the two National League three London and south east strugglers.
The south-coast side found themselves trailing 17-3 at the break after the home side took charge in front of a partisan crowd.
All Havant managed in the opening 40 minutes was a James McSeveny penalty.
Havant stirred themselves after the interval and hit back through a good Jaryd Robinson try, converted by David Keyte, who also notched a penalty soon afterwards.
Any chance of a late fightback disappeared as Havant ran into yellow card trouble and had to play the last 20 minutes with 14 men.
Dom Porter and replacement prop Luke Marks were both sent to the sin-bin and Tring added a decisive try and penalty.
‘We were slow coming out of the blocks yet again,’ said director of rugby Adam King.
‘When we rattled up 10 points in five minutes at the start of the second half we thought we might get back into it.
‘We had Tring under some pressure but the yellow cards killed us.
‘It means we go to Basingstoke next week for a huge Hampshire derby against a team one place below us.
‘We will have to work harder and use the ball far more intelligently than we did against Tring.
‘It won’t be for the faint-hearted as we won by a point at our place earlier in the season.’