If Bruce and Gary Pallister remain the benchmark for United central defensive pairings, the manager thinks the Serb and Rio Ferdinand can reach for it.
"I'm pleased how they've developed. It's a good partnership. They've got pace, they've got strength and there's a good balance between then," Ferguson told the Sunday Times. "I expect more authority this season from Vida. He's been with us a year and a half and this is his third season. He came in the middle of one season and it took him time to adjust, but I'm excited about him. With Rio [29 in November] I can rely on his experience."