Rosslyn Park put in a grandstand finish in their derby at Esher last weekend, scoring three tries in the last 15 minutes and grabbing a bonus point.
League leaders Doncaster Knights also won their home match, against Old Albanians but failed to secure the bonus.
It takes Park to within seven points of the Yorkshire club at the top of National League One, and the two top sides meet at Priory Lane this Saturday, kicking off at 3pm.
Park are pegging their admission price at £10 for adult admission and hoping for a large gate for what they claim is the best value sporting event in London.
Head coach Alex Codling is keeping his feet firmly on the ground and claiming that the pressure is all on Doncaster, the only full-time professionals in the division.
He said, “I was delighted with the character and skill shown by the boys with the three late tries at Esher.
“It was great to get the bonus point win and to score five tries on the road against a side with the quality that Esher have is a real sign of what we are capable of.
“The boys were very frustrated with our discipline at times which allowed Esher to get easy field position.
"We cannot afford to do this against the league leaders Doncaster this Saturday, which is a game the boys can't wait for. It is an opportunity to test ourselves against the league leaders with no pressure on us."
He added: “I really hope there is a big crowd to get behind the boys in what will hopefully be a great advert for National One rugby.”
Park go into the match at full strength.