Sacinandana, Sri Caitanya Mahaprabhu, is that very same Krishna, who took the bhava and complexion of Srimati Radharani, in order to understand Her love. So, we don't have to worship Radha and Krishna, and Lord Caitanya separately. Lord Caitanya is guru-varam, the supreme guru, Who is Radha and Krishna Themselves combined together, to teach us how to worship Them.