Tupton tasted defeat for the first time in the Midlands Division Four East (North) on Saturday at the hands of Buxton.
Following two narrow victories over Belper and Bingham in previous weeks, Tupton came up short in a tasty all-Derbyshire derby.
It was far closer than the score line suggests, 29-12 in favour of Buxton, with Tupton pushing their opponents all the way.
Buxton, who move up to third in the table with the win, made it difficult for the hosts and produced a solid defence display.
It was Tupton who started the brighter kicking up the hill first half, recording a try against the run of play to give the hosts the lead.
But the visitors responded quickly and their number eight, Ben Austin, began to pull the strings as his side went in 24-5 ahead at the break.
A sequence of pick and drives saw Tupton cross over under the posts, giving a taste of what was to come for the Buxton back line.
Again the visitors responded. Only this time, it was the turn of the defence to stand strong and held up the charge several times.
It was attack versus defence for the majority of the second period but the hosts were unable to find another score to turn the screw.
And, with five minutes left to play, Buxton extended their lead with a fine individual effort by Newbourne to put the game beyond doubt.
It was a blow for Tupton’s title hopes but have the benefit of a week off from league action to regroup ahead of a trip to Cleethorpes on October 11.