Havant crashed to a 36-3 London one south defeat at second-placed Chichester.
The home side took their chances well and Havant captain Joel Knight reckoned finishing was the main difference between the two sides.
‘We started well, took the game to them and put them under a lot of pressure,’ said Knight.
‘Unfortunately, then we were guilty of making some silly mistakes, gifting them two or three tries.
‘After that it was tough for us to get back into the game.
‘In the second half we did a lot better and created a number of opportunities ourselves.
‘Unlike in recent games, though, we failed to take them and were not clinical enough.’
Knight grabbed Havant’s only points with a first-half penalty.
United Services recorded a 25-17 Hampshire one win against Aldershot & Fleet at Burnaby Road.
Winger Lewis Andrews grabbed a brace of tries with centre James McAvoy and full-back Bob Hoskins crossing for others.
Outside-half Dave Flynn added a penalty and conversion.
‘Aldershot & Fleet battled to the end and gave us the run out we needed,’ said Services coach Simon Burns.
‘The next five games – starting with a difficult trip to Alton next weekend – will shape our season.’
Petersfield suffered a 10th defeat of the season losing 15-7 against Andover at Penns Place.
In Hampshire two, Fareham Heathens leapfrogged fellow strugglers Alresford with a battling 8-3 win at Cams Alders.
‘We dominated most of the game and should have won by far more points,’ said Heathens press officer Chris Lee.
‘Hopefully we can use this win as a springboard for the rest of the season.’
Southsea Nomads crashed to an 85-0 defeat at Overton.