Michael Owen has blasted Chelsea for splashing £600million on players but failing to sign a goalscorer.
The Blues have struggled to convert chances this season, scoring just 30 goals in 31 Premier League games.
And Chelsea fired another blank as they were beaten 2-0 by Real Madrid on Tuesday night as Spanish giants completed a 4-0 aggregate win in the Champions League quarter-finals.
Speaking on BT Sport, Owen said: 'It's one of the biggest mysteries of all time – how can you spend £500m and hardly bring a player in who's going to influence the goalscoring department?