Chelsea bounced back from a testing few days to earn a commanding first-leg quarter-final away win over Porto in the Champions League.
Mason Mount's clever turn and finish in the first half helped bring some welcome relief to Blues manager Thomas Tuchel after his side's heavy defeat to West Brom on Saturday, which was followed by a training ground incident between team-mates Kepa Arrizabalaga and Antonio Rudiger.
Ben Chilwell added a late second after a mistake by Corona, moments after substitute Christian Pulisic had hit the bar.
Having conceded five goals against West Brom, Chelsea produced a dogged defensive performance to earn a seventh clean sheet in nine European games this season.
Skipper Cesar Azpilicueta's vital block denied Corona before Edouard Mendy kept out Pepe's header.
With both legs of this tie in Spain at Sevilla's Ramon Sanchez Pizjuan Stadium because of coronavirus travel restrictions between Portugal and the UK, this was Porto's 'home' game, meaning Chelsea's two away goals put them in pole position before next Tuesday's second leg.
Resilient Chelsea show grit
This was the perfect response by Chelsea after last weekend's embarrassment - a resilient, determined and professional performance against a team that had eliminated Juventus in the previous round.
Tuchel reacted to the West Brom shambles by making five changes, with Rudiger among those recalled despite his 'heated' row with Arrizabalaga.
Rudiger played his part in an impressive Chelsea rearguard display, Porto carving out several chances without managing to find a way through.
Mendy used his legs to keep out Moussa Marega while Luis Diaz, who scored against Manchester City in the group stage, went close from outside the penalty area.
At the other end, Timo Werner and Azpilicueta missed headed chances to extend the lead after Mount scored before Chilwell's crucial second - a composed finish after bursting into the penalty area and taking it past the keeper - gave his side a handsome win.
BDST: 1232 HRS, APR 08, 2021