The 27-year old has been at the club for over three years now since joining from German giants Stuttgart. He has made over 100 appearances for the North London club, scoring just under a dozen times in the process.
Arsene Wenger is said to be doing everything to hold onto Hleb but it now looks as though he has made up his mind and he will join Barca in the coming days. This news will obviously come as a blow to Arsenal, who also lost Matthieu Flamini last month to AC Milan.
It is thought now that this will see Samir Nasri join the club from Marseille in the coming weeks for a fee believed to be in the region of £12 million. Other players such as Alberto Aquilani and Miguel Veloso have also been linked with a move to the Emirates in recent weeks.