Kai Havertz reportedly gave up his right to claim a £9m bonus when departing Bayer Leverkusen for Chelsea.
After drawn-out negotiations between the two clubs, Havertz finally completed the switch to Stamford Bridge last week.
However, according to Bild, the 21-year-old took it upon himself to ensure that there were no further delays with the big-money transfer.
The report claims that the playmaker held a clause in his Leverkusen contract which left him entitled to 10% of any transfer fee received by the Bundesliga outfit.
With the teams struggling to find common ground, it is suggested that Havertz opted to forfeit the sum which was owed to him, approximately £9m once potential add-ons are included.
The Germany international is expected to make his debut when Chelsea face Brighton & Hove Albion in the Premier League on Monday night.