Portsmouth remain in relegation trouble in London south west two after a disappointing 21-3 defeat at KCS Old Boys.
The loss leaves the Rugby Camp side nine points adrift of safety.
Coach Ian Chandler admitted his team put in a poor performance.
He said: ‘We got what we deserved and that was nothing.
‘It was a very disappointing day at the office and we never really got going.
‘We did okay territorially in the opening 15 minutes but were guilty of kicking the ball away when we didn’t need to.
‘That played right into the hands of their full-back who was a class act.
‘He was the main difference, creating their tries and kicking the rest of their points.’
Portsmouth’s only score came from a second-half Chris Morgan penalty.
Chandler recognises the fight is on to avoid the drop.
‘We still have to play all the teams around us, so our fate remains in our own hands,’ he said.
‘We will have to play a lot better than we did, though.
‘It is important we learn to take points when they are on offer if we are to succeed.’
The Rugby Camp side were also rocked by injuries to Darren Crabbe and Rob Gicquel.
‘No sooner do we start to get players back a couple more get injured,’ added Chandler.
‘That just about sums up our season so far.’
United Services opened up a 10-point lead at the top of Hampshire one with a comprehensive 46-0 win at bottom club Alton.
Director of rugby Matt Davis admitted his team had to work hard for it.
He said: ‘We scored three tries in the opening 20 minutes but it was never going to be easy on a quagmire of a pitch.
‘In the last 20 minutes of the first half we had to defend well because we had gone down to 13 men.
‘We were always in control though.’
Fareham Heathens recorded a narrow 25-20 success at Romsey.
Petersfield slumped to a comprehensive 43-3 defeat on the Isle of Wight.