Thevenard finished the minor round of Far West cricket on a high, defeating Ceduna by five wickets at Ceduna on Saturday.
The hosts posted 5/181 which was successfully hunted down by Thevenard with 5/182.
Ceduna openers Alex Fraser and Jacob Bennett got them off to a great start with a 100-run partnership.
It came to an end when Fraser was caught for 43, but Bennett would make a half-century before he was eventually dismissed for 62.
That wicket left Ceduna at 3/114, and late runs from Charlie Williams, 21, Brendan Kloeden, 33, and Jamie Bennett, 13 not out, pushed the total towards 200.
Matthew Cox picked up 2/65, while Josh Threadgold, Ryan Meier and Jonty Woods shared the other wickets.
Threadgold was caught for a duck as the run chase got off to a poor start, but a partnership of 110 between Lachlan Wilkins and Dom Denton had Thevenard on track.
Wilkins took command in making 72, while Denton was trapped leg before wicket three runs later for 33.
Meier, 34 not out, and Jacob Grills' 22 runs had Thevenard in touching distance of the points and despite losing Grills and Mark Threadgold in the closing stages they got over the line in the 45th over.
Jamie Bennett and Bredon Smart grabbed two wickets apiece for Ceduna.
Elsewhere, Smoky Bay finished third on the ladder after a 42-run win away to Streaky Bay.
Smoky reached 8/146 at the end of their innings and then bowled the home side out for 104 in response.
Chris Williams and Matthew Stott grabbed 29 and 11 runs respectively in a 45-run opening partnership, only for both to fall in quick succession, along with Rowan Chester, to have Smoky Bay at 3/51.
Waylon Drew and Joe Williams put on a partnership of 54 to take Smoky into triple figures.
Williams was caught for 30 and Drew would watch as two more wickets fell for only two runs, but he then had support in the form of Broadie Chandler's 13 runs.
Drew would finish the top scorer with 39 important runs.
Streaky's Darren Brown bowled well to take 3/27 and Mark Dolling added 2/17.
Streaky Bay progressed to 25 until the first wicket, Damien Johnson for 16, came about.
A run of three wickets for five runs - including Aidan Whitford for 14 - left the hosts at 4/44.
Dolling and Jack McInnis came together at 5/54 and put on a partnership of 40 runs which gave Streaky Bay hope.
Yet the wicket of McInnis for 19 triggered a lower order collapse and Streaky Bay lost their final five wickets for 11 runs, leaving Dolling stranded on 27 not out.
Toby Lee cleaned up the tail with 4/7 from 3.4 overs, while Chester, Dwayne Ettridge and Peter Collins all took two wickets.
The opening week of the Far West cricket finals will see Smoky Bay and Streaky Bay meet at Smoky Bay in an elimination semi-final, while Ceduna will host Thevenard for a spot in the grand final.