Bayern Munich have been labelled "disrespectful" by Eintracht Frankfurt director of football Fredi Bobic for allegedly leaking news of their agreement with coach Niko Kovac a day before the announcement.
Salihamidzic said: "We agreed a three-year contract on Thursday".
"Niko Kovač will be the new FC Bayern München head coach from the start of the 2018/19 season", Bayern announced on their official website on Friday.
"Niko played for Bayern, and knows the people in charge, as well as the structures and DNA of the club very well", Salihamidzic continued. "Therefore he is predestined to coach at Bayern", said Heynckes.
The 46-year-old Kovac, who spent most of his playing career as a central midfielder in Germany, was a Croatian worldwide and formerly guided the Croatian national team.
"The procedure, I think, is extremely questionable, as I said before".
Instead, Kovac has built a squad which contains 18 different nationalities which the German-born Croatian has the experience, understanding and openness to manage.
"I hope Ronaldo does not have a good day", said the 72-year-old Heynckes, who coached Madrid to Champions League glory in 1998.
The 44-year-old Robert Kovac also previously played for the club.
"What would fit better than to get a former Bayern player as a coach, who has really earned it at Frankfurt?"
The Croat, who had also coached his country at the last World Cup in Brazil, had impressed by helping Frankfurt survive relegation in 2016 before leading them to contention for a European slot for next season. Champions League qualification is possible this season after another stellar campaign. The club captain sat out the second leg against Juventus due to a suspension and would normally be expected to resume his duties against Bayern.
The UEFA Champions League semi-final draw took place this afternoon.
Bayern Munich and Liverpool are most likely probably the most worthwhile sides throughout the opponents from Germany and England respectively with 5 titles apiece.