#2 Alexander Hleb (From Arsenal, €17m, 2008)
After spending four rather successful seasons at Arsenal, Alexander Hleb joined Barcelona on a four-year deal for an initial fee of €15 million in 2008.
The attacking midfielder, who had a staggering €90 million buyout clause in his contract with the Spanish powerhouse, was a vital member of the Arsenal squad and was also loved by the Gunners faithful.
Hleb ultimately failed to replicate similar form for his new employers and only started 12 of the 36 appearances he managed for the club in all competitions during the 2008-09 campaign.
The Belarusian was a part of the Barca's treble-winning team in his debut campaign at the Camp Nou, but he left the Catalan giants in search of regular playing time the following season, joining his former club VFB Stuttgart on a season-long loan deal.
Hleb then spent the 2010-11 campaign on loan at Birmingham City before joining VFL Wolfsburg on a six-month loan deal in the summer of 2011.
The 38-year-old, who struggled with injuries during his time at Wolfsburg, finally decided to terminate his Barcelona contract by mutual consent in the 2012 winter transfer window.
He was last seen plying his trade for Russian outfit Krylia Sovetov Samara and has since been a journeyman.
It’s safe to say Hleb’s switch to Barcelona was as career-threatening a move as they come.