article_snippet.sent: Chelsea Branislav Ivanovic pictured on the ball during Chelsea's training session on Friday .
article_snippet.sent: Defender Gary Cahill plays the ball during training as Chelsea prepare for United visit .
article_snippet.sent: Didier Drogba tries to find a way past Denmark under 21 defender Andreas Christensen in training .
article_snippet.sent: Dominic Solanke pictured during Friday's training session at Cobham .
article_snippet.sent: Masked man Cesc Fabregas prepares for the visit of United on Saturday night .
article_snippet.sent: Winger Juan Cuadrado challenges Filipe Luis for the ball during a practice match at Cobham .
article_snippet.sent: Filipe Luis chases Eden Hazard to try and retrieve the ball in Friday's training session .
article_snippet.sent: Didier Drogba gave Chelsea the lead when the two teams met at Old Trafford earlier in the season .
article_snippet.sent: Robin van Persie earned a draw for United with a stoppage time equaliser in October .