"Leverkusen currently value Havertz at more than 100 million euros (£89.5m) as they field interest in the winger from Chelsea, Manchester United, Bayern Munich and Real Madrid.
That is around £20 million more than Chelsea would hope to pay for Havertz, but there is a belief that asking price may have to drop if Leverkusen fail to finish in the top four of the Bundesliga."
That was the original quote from the telegraph on that 20 mil reduction. Would certainly not take it as fact that their valuation would drop 20 mil.