Abde Ezzalzouli had put Betis ahead inside nine minutes in Wroclaw and Enzo Maresca's side went into the interval behind. Yet 45 minutes is a long time in football, as the Blues convincingly proved.
Cole Palmer was crucial to the comeback, as he produced the cross that Enzo Fernandez headed home to level the contest. The England international then produced another moment of magic that enabled Nicolas Jackson to guide the ball home from close range.
Yet the Blues were far from done. Jadon Sancho put gloss on the scoreline with a fine finish from an acute angle before, in second-half stoppage time, Moises Caicedo fired home our fourth.
Chelsea: Jorgensen; Gusto (James 46) Chalobah,
Badiashile, Cucurella; Fernandez (c), Caicedo; Madueke, Palmer (Guiu
88), Pedro Neto; Jackson (Dewsbury-Hall 80)
Chelsea substitutes:
Sanchez, Bergstrom, Acheampong, Colwill, Tosin, Amougou, Sancho, George,
Nkunku
Scorers⚽: Fernandez 65', Jackson 70',
Sancho 83', Caicedo 90+1'
Booked🟨: Badiashile
55', Palmer' 79', Sancho 85'
Real Betis: Adrian; Sabaly, Natan, Bartra, R.Rodriguez
(Perraud 46); Cardoso (Lo Celso 85), Isco (c), Fornals (Altmira 85);
Anthony, Bakambu, Ezzalzouli (J.Rodriguez 54)
Real Betis substitutes: Vieities, Gonzalez, Perraud, Ruibal, Mendy, Ortiz, Flores, Garcia
Scorers: Ezzalzouli 9'
Booked🟨: Anthony 88'