The player's representative Dirk De Vriese says the deal made Januzaj the best paid youngster in world football.
"As Adnan was a free agent at the end of the season, the Qatari were ready to offer anything. Anything in terms of wages and signing on fees.
"It could have been interesting from a commercial point of view. But money has never been a deciding factor in his choice."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball