Lionel Messi lit up Camp Nou and devastated Manchester United before firing a warning to Barcelona that they cannot start slowly again.
Barca were superior to United in all departments for the best part of 80 minutes on Tuesday, a 3-0 win perhaps even flattering for their opponents, who were two down in 20, both goals belonging to Messi.
By the time Philippe Coutinho had curved in a third to send Ernesto Valverde’s side into the Champions League semi-finals, United’s stirring opening was long-forgotten, except by Barcelona’s captain.
“We put on a spectacle,” said Messi. “But we came out cold and looked nervous in the first five minutes. We cannot come out like that in a Champions League match. Five bad minutes can knock you out.”