In Rome, Greco continued to do well. He was certainly one of the best players at Court. According to Salvio however, Marano and a number of other Italian players were somewhat stronger.
His attacking prowess was probably better than anyone's. Maybe his defense was a little suspect. William Lewis observed: Greco has been justly celebrated as a first-rate player, and his work is considered by good judges as exhibiting great skill and ingenuity, and abounding with brilliant and instructive situations...
...It does not often happen that Greco's method of attacking can be much improved, for in that part of the game he is eminently skillful, but the like praise cannot be given to his system of defense; it must, indeed, be evident that as most of his games are won by brilliant moves, the defense is necessarily imperfect...