▁season ▁was ▁Ch else a ▁Football ▁Club ' s ▁ 9 9 th ▁compet itive ▁season , ▁ 2 4 th ▁consecutive ▁season ▁in ▁the ▁top ▁flight ▁of ▁English ▁football , ▁ 2 1 st ▁consecutive ▁season ▁in ▁the ▁Premier ▁League , ▁and ▁ 1 0 7 th ▁year ▁in ▁existence ▁as ▁a ▁football ▁club . ▁Ch else a ' s ▁victory ▁in ▁the ▁ 2 0 1 1 – 1 2 ▁UEFA ▁Champions ▁League ▁for ▁the ▁first ▁time ▁in ▁their ▁history ▁qualified ▁them ▁for ▁the ▁season ' s ▁UEFA ▁Super ▁Cup ▁and ▁FIFA ▁Club ▁World ▁Cup , ▁although ▁through ▁finishing ▁third ▁in ▁their ▁Champions ▁League ▁group ▁Ch else a ▁competed ▁in ▁the ▁UEFA ▁Europa ▁League ▁for ▁the ▁first ▁time ▁since ▁the ▁ 2 0 0 2 – 0 3 ▁season ▁– ▁then ▁known ▁as ▁the ▁UEFA ▁Cup . ▁ ▁On ▁ 1 3 ▁June ▁ 2 0 1 2 , ▁Roberto ▁Di ▁Mat te o ▁signed ▁a ▁two - year ▁contract , ▁becoming ▁Ch else a ' s ▁permanent ▁manager , ▁having ▁been ▁appointed ▁as ▁inter im ▁manager ▁after ▁the ▁s ack ing ▁of ▁André ▁Vill as - Bo as ▁during ▁the ▁ 2 0 1 1 – 1 2 ▁season . ▁However , ▁on ▁ 2 1 ▁November ▁ 2 0 1 2 , ▁Di ▁Mat te o ▁was ▁s ack ed ▁after ▁a ▁ 3 – 0 ▁loss ▁away ▁to ▁Ju vent us ▁in ▁the ▁UEFA ▁Champions ▁League , ▁with ▁Rafael ▁Ben í te z ▁replacing ▁him ▁as ▁inter im