A motorcyclist has been injured after being rammed by a four-wheel-drive on Melbourne's Eastern Freeway, police say.

The incident occurred during peak hour on Monday morning at Nunawading.

The ramming happened on the city-bound on-ramp of the Eastern Freeway at Springvale Road on Wednesday morning. Credit:Michael Rayner

Police have been told the motorcyclist merged in front of the gold Toyota 4WD on the city-bound on-ramp of the Eastern Freeway at Springvale Road about 7.30am.

It is believed the male driver of the 4WD began yelling at the rider, before ramming his vehicle into the back of the motorcycle.