The game was Potter's first in charge since replacing Thomas Tuchel as Chelsea manager last week.
Raheem Sterling gave Chelsea an early second half lead but Noah Okafor equalised for the visitors with 15 minutes to go.
Chelsea have now picked up just one point from their opening two games and are bottom of their group ahead of their double header against Italian championd AC Milan.
"We're disappointed with the result. I thought the boys gave everything," he told BT Sport.
"We scored a good goal but lost a bit in the second half. Their goalkeeper has made some good saves. It is what it is, we have to dust ourselves down.
"Personality and application was good, we will get better. We got Raheem in one-on-one situations quite often and the goal was a good result of that.
"It's always irritating when you concede a goal. Overall the defensive performance was quite good, it's just the little details we will have to improve.
"It has not been easy for the boys. They have responded to us really well over the last few days, and it's a point we will have to take and get better.
"The attitude has been fantastic, so no complaints apart from the fact we have not taken three points."
"It's not the position we want to be in, but we have to respond, it's as simple as that," Potter said at his post-match press conference.
"It's a tough group, but there's enough quality in the squad, and we have to respond to those two games.
"We are at the start of a process together as staff and players. I am looking forward to working and making this team competitive and one supporters are proud of."
