Here are his five predecessors who fared best in battles with the Blues, ordered by their derby win percentages...
1. SIR ALEX FERGUSON
Win ratio: 55.32 per cent
The man who has managed in the most derbies also won the most, winning 26 encounters and losing only 11 out of 47.
Standout victory: A 5-0 home win in November 1994 is still our record triumph over Manchester City.
Full record: P47 W26 D10 L11 F78 A60
2. ALF ALBUT
Win ratio: 54.