Wednesday evening saw Chelsea complete the set in terms of European trophies won after they comprehensively beat Real Betis 4-1 in the UEFA Conference League final.
The Blues are the first and only side to now have a Champions League, Europa League and Conference League trophy in their cabinet, but they owe a huge debt of gratitude to Cole Palmer for sparking the revival which saw them overrun their Spanish opponents in the second half at the Tarczynski Arena in Wroclaw.
Chelsea's Reece James holds the Conference League trophy aloftMarco Steinbrenner / DeFodi Images / Profimedia
At half-time Enzo Maresca's side were behind to a masterful finish from Ez Abde, the 13th time in 15 Conference League games that Betis had stopped the opposition from scoring a first-half goal - more than any other team in the competition.
That's despite the Blues having 67% possession in the final 15 minutes of the half, though never really looking like making that count.
Long way back for Chelsea after Betis opener
It was the Verdiblancos' fourth goal in the opening 15 minutes of a Conference League game - only Chelsea have more (five) - and the west Londoners would've known that Betis had a record of W7, D4, L1 when scoring the opening goal in the 2024/2025 UEFA Conference League, so a comeback was going to be a tall order - particularly as the Stamford Bridge outfit had been booed off at the break after what was, in truth, a disjointed performance.
Conference League final match statsOpta by Stats Perform
Step forward England international, Palmer.
Rarely can one player have written his name so large across a major European final.
Palmer's languid style was helping him find time and space on the ball, something opposition teams should never give the 23-year-old, purely because of his quality on the ball and ability to make things happen. And happen they surely did.
Palmer took the game by the scruff of the neck
A sublime, pinpoint cross to Enzo Fernandez for the 65th-minute equaliser was vintage Palmer, and as he said in the press conference after the game, "I'd just had enough of going backwards and side to side."
In that one magical moment, everything changed in the final. It breathed life into Chelsea and within five minutes they led, Palmer again with the assist, twisting and turning Jesus Rodriguez inside out before finding Nicolas Jackson to chest home and send the travelling support wild.
Cole Palmer and Enzo Fernandez celebrate Chelsea's opening goal during the UEFA Conference League FinalMarco Steinbrenner / DeFodi Images / Profimedia
Six touches in the Betis box - at least double of any of his teammates - and seven dribbles were evidence of Palmer's growing influence on proceedings.
Not to mention his winning back of possession on three separate occasions and involving himself in 10 one-on-ones with a direct opponent.
Were Chelsea complacent at the start of the final?
Perhaps Chelsea had approached the game with a degree of complacency, and as so many teams have found out before, if you don't turn up with the right attitude in games, you get found out.
Palmer not only lit the blue touch paper, but he galvanised the entire Chelsea squad. He gave everyone the belief that it was their time and stood up to be counted.
Chelsea manager Enzo Maresca stands dejected after Real Betis opened the scoring in the Conference League finalRafal Oleksiewicz / PA Images / Profimedia
Twenty-one passes in the final third of the pitch were the joint most of any Blues player, and an 84.2% pass completion (whilst not the best) was more than acceptable given what else he'd brought to the party.
Though it wouldn't be until seven minutes from time before everyone could start the celebrations after Jadon Sancho added Chelsea's third, the game was effectively over as a contest after Palmer's double intervention.
Champions League football returns to Stamford Bridge
With Champions League football now back on the agenda at Stamford Bridge next season, the board of the club have to get things spot on in the transfer market this summer.
Though Chelsea have some great players within their ranks, they have struggled at times to impose themselves in games.
Cole Palmer enjoyed a magnificent Conference League final for Chelsea against BetisMateusz Birecki / Zuma Press / Profimedia
That it needed until the final game of the 2024/25 Premier League season for confirmation of qualification into Europe's premier football competition hints at the grind and the struggle under Maresca at times.
Immaculate sense of timing
Even Palmer had gone off the boil after a solid start to the campaign.
Before Wednesday night's master class, he had scored only three times in the calendar year - all in games that Chelsea didn't win (a loss against Liverpool and draws vs Crystal Palace and Bournemouth) - as well as supplying just two assists since January.
Therefore, it was with an immaculate sense of timing that he awoke from his personal slumber.
Cole Palmer poses with his Man of the match award following Chelsea's 4-1 victory in the Conference League FinalJonathan Moscrop / Zuma Press / Profimedia
Pep Guardiola didn't seem to want Palmer to leave Manchester City, but nor did the Catalan appear to do an awful lot to get the player to stay once Chelsea made their intentions clear.
Looking back now, given how poor City were throughout 24/25, how Guardiola and the board must be rueing the fact that they let the England international slip through their fingers so easily.
From Palmer's own point of view, after what turned out to be a vintage personal performance, he only needs to keep looking forward from this point.
Jason PettigroveFlashscore