The statement follows Barca confirmed that Arthur was moving in the other direction for a fee of EUR72m plus EUR10m in variables.
Pjanic will end up the season with Juventus and then head over to the Camp Nou at the end of the 2019-20 campaign.
Barcelona finally revealed on Monday that Miralem Pjanic will join the club at the end of the season from Juventus.
The 30-year-old has signed a four-year offer at the Camp Nou and arrives for a cost of EUR60 million plus EUR5m in variables. He has a buyout stipulation of EUR400m.