A good second-half performance saw United Services Portsmouth beat Camberley 23-19 in the RFU Senior Vase at Burnaby Road.
The Sailors trailed 19-15 at half-time but scored the only points of the second half with a try and a penalty.
Meanwhile, Portsmouth gave new coach Ben Dudley a fine start by winning 11-10 at Dartfordians in the RFU Intermediate Cup.
Dudley took over at Rugby Camp as player-coach after moving from National League Worthing during the summer.
Assistant coach Jim Pearce was pleased with the character the team showed.
‘It is nice to start with a win going into the league season,’ said Pearce.
‘We found ourselves under a lot of pressure in the final 10 minutes but we managed to clear our lines.
‘To be fair we were up against young opponents on a hot sunny afternoon.’
A Tom Whitehouse try put Portsmouth ahead, after full-back Tom Cantwell’s charge.
The home side hit back with a try of their own before a Simon Morgan penalty gave the visitors an 8-5 lead at the break.
Dartfordians responded but Morgan knocked over the decisive 40-metre penalty.
Portsmouth Rugby Club came to the aid of Locks Heath Pumas by lending them their mini-bus for the RFU Junior Vase trip to Old Georgians.
However, the Pumas suffered a 41-3 defeat in the first round tie, after the misery of having their bus stolen.
The Pumas start their Hampshire one season next week.
Petersfield stormed into the next round with a comprehensive 57-17 win at Woking.