The World's End won the Marsh Hurdle at Ascot after cancellation concerns due to heavy rain and waterlogging.
L'Ami Serge led for much of the Grade One contest but tired towards the end.
Papagana finished third after last year's winner Paisley Park pulled out of his defence of the title following two course inspections.
"It's great to get a Grade One under his belt again," winning jockey Adrian Heskin told Sky Sports.
"I probably didn't go fast enough with the ground being the way it was and I did not want to leave him open to getting too tired.
"I know that might not have been the strongest of renewals but he was due one."
Rails were moved for a "satisfactory racing line" to allow racing to continue, but Paisley Park's trainer Emma Lavelle said before the race: "Ascot have done a great job but there are a couple of patches of false ground.
"We have taken the decision to pull him out as he is too good a horse to risk him."
BBC racing correspondent Cornelius Lysaght
With the defection of Paisley Park because of the rain-soaked going, this was not perhaps the greatest Grade One race of all time, but still a creditable performance from The World's End who regained the lead from L'Ami Serge late on.
I saw one quote of 20-1 for The World's End in the Stayers Hurdle, and having been given a decisive beating by Paisley Park at Newbury last time that's probably fair enough.
Tom George and Adrian Heskin have been increasingly a trainer and jockey combination to follow in 2019, and it should only thrive in 2020.