Although he represented Croatia, Kovac was born in Germany's capital city - he is the son of Yugoslavian immigrants.
Just like when Guardiola succeeded Heynckes in 2013, Kovac could potentially start work after a treble-winning campaign, with Bayern having already secured the Bundesliga title, their sixth consecutive league crown.
Both Frankfurt and Bayern last week denied that Kovac was on his way to Munich.
Heynckes, brought in after Italian Carlo Ancelotti's sack, is leaving at the end of the season, the German champions said on Friday.
It's a success built primarily on a touch-tackling, solid defensive unit in the former holding midfielder's own image.
It was a 15th Champions League goal this season for Ronaldo, playing his 150th CL game, and he has now scored in 11 consecutive games in the competition.More news: What that says about the GOP, midterms
"Niko's done a fantastic job, he took over Frankfurt when they were in a hard position and now they're pushing for Europe", Salihamidzic told FCBayernTV. They also met last season in the last eight when Real triumphed 6-3 on aggregate. Frankfurt has a German Cup semifinal match against Schalke next week. "But different cultures mean different influences and different ways of thinking". The siblings played together at worldwide level, as well as at Bayern.
Kovac has also previously coached Red Bull Salzburg's second side, before taking on the role as assistant of the first team under Ricardo Moniz.
But the Romans have more about them than they're given credit for despite proving their mettle in that remarkable comeback against Barcelona and I fancy them to go through over two legs. You need time and patience to grow.
Frankfurt sporting director Fredi Bobic blasted Bayern for not getting in touch beforehand, and for the timing of its announcement.
The Bundesliga champions have been searching for a replacement for current boss Jupp Heynckes since he took over in October with his retirement imminent.
Kovač will collaborate with some of the world's biggest stars at Bayern, though we are still unsure if Arjen Robben and Franck Ribery will remain at the club. His brother Robert Kovač (44) will join Niko Kovač, who is now Eintracht Frankfurt head coach, as assistant. "Not of Eintracht Frankfurt".