Chelsea kept their season alive by beating Borussia Dortmund 2-0 at Stamford Bridge to progress to the quarter-finals of the Champions League 2-1 on aggregate on Tuesday.Raheem Sterling and Kai Havertz, with a twice-taken penalty, got the goals as the Blues relieved the pressure on manager Graham Potter.The Englishman's job was on the line after a season that has so far failed to deliver any return on a world-record injection of over £500 million ($600 million) in one season on new signings.Chelsea had won just three of their previous 16 matches to fall to 10th in the Premier League and bow out early of both domestic cups.But some of their expensive collection of stars showed up in time to remain in the hunt for a third European Cup.Kick-off was delayed by 10 minutes after Dortmund got stuck in the heavy London traffic on arrival to the stadium.Once the action got underway, Chelsea sped out of the blocks.Alexander Meyer had to fly off his line to block from Joao Felix from a narrow angle before Havertz fired a big chance into the side netting.Dortmund arrived in England on the back of a 10-game winning run in all competitions.But the visitors posed barely any attacking threat in the first half bar a Marco Reus free-kick that Kepa Arrizabalaga did brilliantly to palm to safety.Chances continued to come and go at the other end.
Havertz smashed a volley off the inside of the post and then finally found the net via the underside of the bar only for the goal to be ruled out for an offside against Sterling earlier in the move.The worst miss was to come as Kalidou Koulibaly miscued with an open goal from Ben Chilwell's free-kick and Felix's follow-up effort was blocked on the line.Potter was uncharacteristically animated on the