Audio leaked by El Confidencial has caused a stir this Monday.
Pique has even been caught discussing how to divide the payments, with Rubiales promising him €6m in commission.
Rubiales has always denied the involvement of Pique and his investment fund Kosmos in the negotiations on the Supercopa.
The Supercopa was traditionally contested between the winners of La Liga and the winners of the Copa del Rey in Spain.
But in 2019 it was announced that the competition would be expanded to four teams, also including the runners-up in La Liga and the Copa, and taken to King Abdullah Sports City in Jeddah.
Many believe this decision was taken to increase the likelihood of being able to host another Clasico in foreign climes and has been heavily criticised due to Saudi Arabia’s poor human rights record.
Incredible report from El Confidencial on how Piqué and Rubiales negotiated taking the Supercopa to Saudi Arabia. This audio of Piqué proposing how to divide the payments is quite something. pic.twitter.com/DnjrdyIZKy
— Euan McTear (@emctear) April 18, 2022