Christian Malcolm did not exchange the baton with Chambers following the first leg.
Mike CostelloBBC Sport in Helsinki
The Championships were inconclusive for the most part in solving selection headaches for the Games.
Dwain Chambers will get the nod in the 100m but the make-up of the sprint relay quartet is likely to change after the latest failure here.
Rhys Williams cemented his place in the 400m hurdles by taking gold while Lynsey Sharp's silver in the 800m was reward for a shrewd, tactical run, but she still hasn't clocked the Olympic qualifying standard.
And the pedigree of Jenny Meadows at global championships must also be taken into account even though she hasn't run this season.
Jemma Simpson did compete in Helsinki, but finished seventh in the final.
"The women's 800m is a very difficult one," Van Commenee said. "There may possibly be some back-up places for the relays to debate too. I can't see many other big issues really."
Asked if he thought Meadows had done enough, he said: "There are a number of athletes who haven't shown much, or nothing at all. So we'll look into it on Monday."
Van Commenee hinted that that one member of the men's relay 4x100m squad disqualified in Helsinki - Malcolm, Chambers, James Ellington and Mark Lewis-Francis - would drop out to make way for Adam Gemili.
He said: "The fastest man of the year, Adam Gemili, is not here, so I think he's got a strong case to be in the relay team. In which position remains to be seen."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.