With eight minutes of injury-time added to the first half, the Londoners were able to level through Didier Drogba after the Ivory Coast striker was set clear by Frank Lampard.
Ivory Coast forward Drogba, who was set to attend Chelsea's first day of pre-season training on Monday, has been linked with Milan's city neighbours Inter as well as Spanish giants Real Madrid and Barcelona.
The UN peacekeeping force in Ivory Coast, known as UNOCI, is set to reduce its size from about 9, 000 military personal by one battalion to 8, 837 by 31 July.