Diego Costa may be Chelsea's star striker but he has well and truly misfired in this season's Champions League. Chelsea were knocked out of the last-16 on away goals on Wednesday night after the tie against PSG finished 3-3 on aggregate. And yet again it was another barren night for Costa, who has failed to score a single goal in seven Champions League appearances - a total of eight hours and 28 minutes of action - this season. Diego Costa shows his frustrations during Chelsea's Champions League exit on Wednesday night . PSG defender David Luiz gestures towards Costa during the 2-2 Champions League draw at Stamford Bridge . Costa (centre) argues with PSG defender Thiago Silva on a frustrating night for Blues fans . It pales into comparison with the Brazilian-born Spain striker's Premier League goalscoring record of 17 goals in 21 appearances. Costa has averaged 2.4 shots per game in the Premier League, while he could only manage 1.7 in Europe's premier club competition. The 26-year-old's domestic shooting accuracy (shots on target) is 68 per cent, which beats his European figure of 50 per cent. Costa's failure to score in the competition this season is all the more remarkable when you consider how influential he was in Atletico Madrid's run to the final last year. He scored eight goals in nine Champions League appearances last season and finished as the competition's third highest scorer. Costa celebrates after Chelsea go 2-0 up against Spurs in the Capital One Cup final - but it was an own goal . Costa scores Chelsea's third goal in the 5-0 win against Swansea at the Liberty Stadium in January . In general, Costa's cup record for Chelsea has been poor, also failing to score in one FA Cup and three Capital One Cup appearances. Some, including the man himself, have argued that he deserves credit for Chelsea's second goal in their 2-0 win over Tottenham Hotspur in the Capital One Cup final but it was officially given as a Kyle Walker own goal after a deflection. It aptly sums up his woes for Chelsea in the cup competitions this year.
Diego Costa did not score once in seven Champions League appearances . The striker has not scored for Chelsea in any cup competition . Costa's Premier League record is 17 goals in 21 appearances . READ: Costa and Eden Hazard battle in vein as David Luiz inspires PSG . CLICK HERE for latest Chelsea news and reaction from Wednesday night .