Chelsea still owe £71m to Inter Milan for the Romelu Lukaku deal, according to a report.
The Blues signed the Belgian international during the previous summer transfer market for £97.5m, which was a club-record fee.
Initially, the defending European Champions paid the Italian side £19m, and the agreement was set to pay the full fee in five different instalments for around the same lump sum each time.
According to The Sun, Chelsea still owe £71m, while there is also another £100m that the club needs to spend on other transfers that they have yet to complete.
However, the Blues are also expected to bring in £167m from other teams due to player trading deals that they have been involved with, which would help cover this.
Lukaku has played 19 times in the Premier League this season, including this weekend against Newcastle United, where he has scored five times.
