The Blues boss suggested more experience is needed as they look to continue a positive season in England and on the continent
Frank Lampard has indicated Chelsea will look to sign at least one new attacker in January after having their transfer ban halved.
An appeal to the Court of Arbitration for Sport brought an early end to the original two-window embargo last week, enabling the Blues to become active participants in the transfer market.
An inexperienced squad reached the Champions League last 16 with Tuesday's 2-1 home win over Lille and could now be reinforced.