Chelsea players train at their Cobham headquarters on Sunday . Jose Mourinho 's side face Arsenal at the Emirates on Friday . Chelsea looking to extend their 10-point lead over second-placed Arsenal . Mourinho has never lost to Arsenal manager Arsene Wenger . Cesc Fabregas chose Chelsea over Arsenal for trophies , says Mourinho .
Chelsea players train at their Cobham headquarters on Friday . Jose Mourinho 's side face Arsenal at the Emirates on Sunday . Chelsea looking to extend their 10-point lead over second-placed Arsenal . Mourinho has never lost to Arsenal manager Arsene Wenger . Cesc Fabregas chose Chelsea over Arsenal for trophies , says Mourinho .