Red Bruise On Leg Due To Attack By Dog. No Bite Or Open Wound. Is Medical Attention Needed?

today i was attacked by a dog while jogging ,the dog was a german sheppard it was tied n front of a house and the chain got loose and attacked me but i turned and controled him and held him down wih my hands,stil it tried to bite me in my leg while i was pushing him away ,there was a saliva mark on my pants and his teeth did not penetrate and cut me but it broosed my leg and it got red if like i banged it on a coffee table or so.No blood ,no teeth cut or open skin.Still i'm worried about rabies,am i at risk?should i seek medical attention? thanks