One key Chelsea player has now not been seen in training in the build up to the club’s return to Premier Legaue action later this week. Pictures on the 5th Stand App didn’t show the player in question involved with the rest of his teammates, as a number of big stars made partial returns. The Blues are preparing for the crucial London derby on Thursday against Tottenham, with it having massive implications on their hopes for qualifying for European football for next season. Chelsea struggling with injuriesInjuries have played a real part in their inconsistent performances so far this season, wi…