Weitering looks worse for wear as he staggers backwards after copping an accidental arm to the jaw.
He is being assessed on field by medical staff, but looked very dazed after the contact.
Meantime, Fritsch wastes no time to kick his second of the night and give the Dees a seven point lead, but it doesn’t last long.
The Blues get down their end quickly, with Curnow’s big kick saved on the line by Demon Lachie Hunter.
The Demons are up by six points.
Melbourne have 19 of the last 28 inside 50s.