The Saddlers created several good goal-scoring opportunities during the game but, as has been the case so far this season, they failed to find the target, having to settle for a share of the spoils.
Marcus, who was speaking shortly after Coventry had secured a bonus point via a 5-4 penalty shoot-out win, went on to admit that whilst the Saddlers' defence is doing well, the front-line is failing to hit the mark meaning no-one is secure in their position.
The 46-year-old well travelled former Bristol Rovers, Huddersfield Town, Ipswich Town, and Sunderland striker agreed that there was plenty of work to do but also several positives to take from the contest.
Speaking via the Express & Star, Marcus said; "We probably should have won the game. Their keeper has had to make far more saves than ours did. But it is a new group, they are still getting to know each other.
"Defensively we are doing great. But we need to start scoring goals, we know that. Because we aren’t getting results, everything is up for grabs. But there were one or two who came into the team and did great.
"We have had a new striker come in, Rory Gaffney. We have to work with them to get them going. But there have been plenty of positives, the guys have shown the non-negotiables - team spirit and hard work for the team. Off the back of those things you can build."