Christian Sewing, the chief executive of Deutsche Bank, believes there is a strong case for a merger with rival Commerzbank, according to a person with direct knowledge of his thinking. 

Sewing's stance ahead of today's meeting of the supervisory board of Germany's largest bank sets the stage for a showdown with unions fearing massive job cuts. 

Sewing sees multiple benefits of a merger, including "clear" dominance in its home market, scale, and shared technology costs, the person said. 

Deutsche's CEO also believes that a combined entity would improve the cost of funding, with "the best funding ever", the person said. 

Jobs would be cut with or without a merger, the person said. 

Deutsche Bank and Commerzbank declined to comment. 

The position marks a shift in Sewing's position. 

In past months, he has urged patience, preferring to focus on internal restructuring before taking on a big project, according to other people with knowledge of his thinking. 

The comments also contrast with the neutral tone set in a letter to employees on Sunday after both Deutsche and Commerzbank confirmed talks.

Sewing said then that many factors could still prevent a merger. 

Deutsche Bank would not have entered talks if the bank expected negotiations to fail, a second person with knowledge of Sewing's thinking said.