Andrea Orcel stunned Germany last week by raising UniCredit’s stake in Commerzbank from 9 per cent to 21 per cent in a manoeuvre that mirrored tactics made notorious in hostile takeover battles more than a decade ago.

A senior German banker said there a several reasons why a takeover of Commerzbank AG by UniCredit SpA could be beneficial, demonstrating that the strong opposition to the potential deal by the country’s government isn’t a national consensus.

ECB chief Christine Lagarde said Monday that cross-border banking mergers in Europe were "desirable" to boost their competitiveness, despite mounting German opposition to a potential tie-up between Commerzbank and Italy's UniCredit.