How can I kill grassy weeds in a new Wintercreeper groundcover?

Question:About 1 month ago we dug up a bunch of bermuda sod and planted bare root Purple Wintercreeper for a groundcover. The plants are doing nicely, but now there are weeds, including grass invading the beds. Is there anything that will kill the weeds, but not my groundcover?

Answers:
they make a product called over the top it will take care of grassy weeds that take over plants.. just read on the bottle also there is a product called fusalade that is even better its made by lesco product but not sure if there is one there where you are at im in chattanooga tn but there is products that should take care of it