City opened the scoring early on through James McAtee after a dominating start to the game.
United then hit back courtesy of a penalty from Ethan Goldraith, however the game was flipped on its head 35 minutes in as Adrian Bernabe was given a straight red card.
The hosts then capitalised on their man advantage, taking the lead through Facundo Pellistri moments later.
Despite the setback and being a man down, City clawed their way back, and netted a well deserved equaliser through defender Taylor Harwood-Bellis.
After the game EDS manager, Maresca was bursting with pride.
"In the end I think we deserved to win the game the lads showed great effort and compromise," he said, "and even in the first 10 minutes when it was 11-v-11, we started well and created more chances."
In spite of being a man down Maresca was extremely pleased with his side's ability to adapt to the setback, especially in the second half.
"The second half was unbelievable. We created at least four or five chances, so I think we absolutely deserved to win the game.
"In the same moment I think it is a good test to understand if we can work in the right way, we can do something important."
Despite dropping points, the EDS boss also believes there are plenty of positives to take from the draw.
"With ten players for more than 45 minutes and you decide to try and win the game, that means a lot," he added.
"We create many chances that we missed but I don't care about that. For me, it was very important to see how we play as a team and it was a great performance."
The point means we go back to the top of the Premier League 2 table on goal difference, ahead of next week's clash with West Ham United before the Christmas break.