Gloucester narrowly defeated Worcester in a desperate and tense display at Kingsholm.
Four Billy Twelvetrees penalties was the difference between the two sides, as both teams missed chances to crash over.
Paul Warwick was unlucky to be held up on the line for Worcester, while Dan Robson's burst to the line was curtailed by a high collaring from Richard de Carpentier, who was then sin-binned.
TWO Twelvetrees penalties put Gloucester 6-3 ahead at the break, in what was an otherwise low-key half with very few try-scoring chances for either side.
Warriors efforts have been blighted by handling errors, while Gloucester have squandered territory through ill-disipline.
Kick-off for this derby clash was at 2.30pm, after a crossbar was broken during pre-match entertainment.
The game, involving lifting giant, inflatable balls over the crossbar, broke a bracket on the posts.
Though the crossbar was fixed, kick-off was delayed by 30 minutes.
Gloucester take on Worcester at Kingsholm today in a Premiership game Nigel Davies has dubbed the 'biggest match of the season'.
The Cherry and Whites have only won one game at home this season - a 26-24 thriller over Northampton Saints.
But Worcester are winless in the Premiership this term and sit at the bottom of the table.
The Warriors are also on a 14-match losing streak and of 19 league games played this year they have only won once, against Wasps back in March.
While those statistics may favour the hosts, Worcester director of rugby and former Gloucester boss Dean Ryan will be itching to claim a Cherry and White scalp as Worcester's first win of the 2013/14 season.
A dismal 16-10 home defeat to Edinburgh in the Heineken Cup last weekend exposed how shaky fly-half Freddie Burns' form is.
As a result the 23-year-old has been dropped to the bench, while debate over his future in the Premiership - be it at Gloucester or Leicester - rages on with the news Toby Flood will leave the Tigers at the end of the season.
Billy Twelvetrees moves to 10, with Mike Tindall and Henry Trinder forming a centre partnership. Jonny May and Charlie Sharples are on the wings, with Rob Cook at fullback.
Jimmy Cowan reclaims the scrum-half shirt, while Sila Puafisi starts for Gloucester at tighthead for the first time since signing for the Cherry and Whites.
GLOUCESTER: R Cook, C Sharples, H Trinder, M Tindall, J May, B Twelvetrees, J Cowan, N Wood, D Dawiduik, S Puafisi, E Stooke, J Hudson, M Cox, M Kvesic, B Morgan
REPLACEMENTS: H Edmonds, Y Thomas, S Knight, T Hicks, A Qera, D Robson, F Burns, M Thomas
WORCESTER: C Pennell, J Stephenson, A Grove, R Fatiaki, J Drauniniu, Ignacio Mieres, J Su'a, Of a Fainga'anuka, C Booker, R O'Donnell, J Percival, M Galarza, R de Carpentier, S Betty, J Thomas
REPLACEMENTS: N Seymour, J Becasseau, J Andress, C Jones, L Senatore, P Hodgson, P Warwick, A Symons
REFEREE: JP Doyle