I have seen a few cases--not good--unsightly. No control method.
My suggestion is to use a cup cutter. Spray Roundup inside the cutter for a neat 4 inch circle. Repair by using a plug from another area or from some sod.(Adding soil to make it level). Or skip the Roundup and just use the cup cutter and replace with fresh grass.
Take look carefully...dig up..is it spreading by seed-or by underground rhizomes or roots?