Crystal Palace will have to win a two-legged knockout phase play-off in February to reach the last 16 of the Conference League after being held to a 2-2 draw by Finnish champions KuPS at Selhurst Park.
With a Premier League trip to Leeds less than 48 hours away, Oliver Glasner fielded a mixture of fringe players and youngsters for the must-win tie, only to see his side throw away the lead Christantus Uche had given them inside five minutes.
Teenagers given their senior bow
Sixteen-year-old Joel Drakes-Thomas became the youngest Englishman to play in Europe's third-tier competition, while 17-year-old Dean Benamar and 18-year-old George King also made their senior debuts as Glasner reshaped his XI around the rest of a relentless schedule.