Grevious smiled as he saw Mace's ship leave the Invisable Hand. Now without that interferance, he could continue to monitor the affairs which were taking place on his ship's observation platforms. Grevious knew that the Count Dooku would likely loose this battle but Grevious couldn't allow him to die. He had a legion of the best droids at his disposal and allthough the legion wouldn't be able to defeate the Jedi, the Jedi wouldn't defeate the legion.
Make love, not toast.