Wolfsburg were soundly beaten 3-0 away from home on Saturday, leaving them cemented in relegation trouble and teetering just above the relegation play-off place.
"We'll discuss behind closed doors what the reason for [his performance] was," Rebbe said.
"This was not a good match from Divock, you need to make that clear. We need to analyse how those 42 minutes could happen. This was not what we agreed upon during the week."