Lewis Tierney scored two tries as Catalans Dragons retained their Super League status and condemned Leigh Centurions to an immediate return to the Championship with a 26-10 victory in the 'Million Pound Game'.
The Dragons, who have been a Super League club since 2006, trailed 6-4 at half-time in the fixture between the teams who finished fourth and fifth in this season's Qualifiers.
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Leigh then claimed the first try of the second period through James Clare, but Catalans hit back with 22 unanswered points -including four penalties from Luke Walsh - as the hosts paid the price for a string of infringements.
Steve McNamara's side can therefore look forward to another year in the top flight, despite a desperately disappointing 2017 campaign, while Leigh face the challenge of bouncing back after a single season among the elite.
Dragons coach McNamara, who succeeded Laurent Frayssinous in June, told Sky Sports: "Credit to the players - they've stuck in there.
"We're relieved, massively relieved. You can see that. We've got players crying, with relief, not with joy."