Havertz is Chelsea's top target this summer, as Frank Lampard looks to add to the arrivals of Hakim Ziyech and Timo Werner.
Staggering stats that once again outline just how well Chelsea have done to clinch a UEFA Champions League place this season.
That is thought to have been the convincing factor regarding Havertz's future and Bosz admitted a decision has already been made. "I think a lot of that is down to the goalkeeper, if I am being totally honest". "For example, these daily rumours about transfers", he told Deutschen Presse-Agentur .
"I have known him for two years".
Chelsea and Ajax have already done business this year, with Moroccan global Hakim Ziyech moving to SW6 for £33.3 million. That is all I can say about Kepa. "Perhaps the crucial call will come today, maybe next week, maybe not at all".
The 25-year-old was dropped for Chelsea's Premier League final day victory over Wolves, and the stopper is reportedly convinced he will not win his place back in time to feature in the Champions League tie at Bayern Munich on August 8.
Once their domestic season is wrapped up the west Londoners can continue their summer spending spree.
Havertz scored 17 goals and registered eight assists for Leverkusen in 2019-20 and is already being tipped to become one of the best players in the world.
But Bosz would not go as far as to compare the Germany worldwide to Lionel Messi and Cristiano Ronaldo.
According to The Athletic, the Cameroon global would be available for a fee of around £26.9 million and it is reported that there has been regular contact in recent months between Chelsea and Onana's representatives, with the player understood to be attracted by the idea of joining the Blues.
"But in Germany he is treated as if he was already one".