India international striker Robin, who came in place of Seminlen Doungel in the 70th minute, scored in the third minute of the added time to snatch one point for Delhi after Fenchman Frederic Piquionne had put Mumbai ahead in the 70th minute at the Jawaharlal Nehru Stadium.
The goal, which came just a few seconds before the final whistle, gave the nearly 15,000 strong Delhi crowd something to cheer in the match which witnessed fast-paced to and fro action but saw little goal-scoring chances.
On the other hand, Mumbai jumped to fourth spot from previous sixth with 11 points from eight matches. They will have to still search for their elusive away win in the ISL as they have failed to register one in the first edition also.
It was a cagey first half with both sides not really testing the opposition goalkeeper though there were enough to and fro action at the attacking third. Delhi had better ball possession but Mumbai attack had more thrust with Sunil Chhetri, Sony Norde and Piquionne working in tandem.
Six minutes later, Nabi was in the thick of action again and this time also he failed to reach for a Seminlen Doungel downward header off a Florent Malouda floater inside the Mumbai box.