You would most likely turn the tablecloth to the wrong side. Fold it in the center of the hole so that it becomes a small half circle.Start stitching about an inch away from the hole starting from very little fabric across the hole area and past it narrowing the area as you go along... I'm assuming it's a small cigarette hole
If it's a very valuable cloth take it to someone that does reweaving. Your tailor may be able to help you.